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LEGO Technic Excavator Construction Toy 42055

4.6 4.6 out of 5 stars 1,367 ratings

Without additional batteries
Brand LEGO
Manufacturer Minimum Age (MONTHS) 132.0
Material Plastic
Colour Multicolor
Educational objective Creative Thinking
Number of pieces 3929
Theme Architecture
Cartoon character Pig" or "Piggies
Special feature Non Toxic
Model name technic excavator

About this item

  • Build the highly detailed 2-in-1 model featuring an array of different motorised functions
  • Includes LEGO Power Functions such as forward and reverse driving, rotating bucket wheel, moving conveyor belt and rotating superstructure
  • The largest LEGO Technic set ever made
  • LEGO Technic building toys are compatible with all LEGO construction sets for creative building
  • Bucket Wheel Excavator measures over 41cm high, 72cm long and 29cm wide. Mobile Aggregate Processing Plant with boom retracted measures over 21cm high, 88cm long and 21cm wide, and over 33cm high with boom extended. Mine Truck measures over 10cm high, 19cm long and 10cm wide
  • Includes 4 figures: Red, Stella and 2 piggies.
  • Pig City features a zip line, hot dog stand, small house and a falling boulder.
  • Accessory elements include a catapult for the birds, umbrella, 5 eggs, 3 sticks of TNT, TNT storage box, 5 balloons, hot dog plus ketchup and mustard dispensers, and a ladder.
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Product Safety

This product is subject to specific safety warnings
  • Warning:Not suitable for children under 36 months

  • Warning:To be used under the direct supervision of an adult

  • Warning:Toy inside. Adult supervision recommended

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Regardless of your statutory right of withdrawal, you enjoy a 30-day right of return for many products. For exceptions and conditions, see Return details.

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LEGO Technic Excavator Construction Toy 42055


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From the manufacturer


LEGO Technic provides a real challenge for experienced LEGO builders. With elements like working suspensions and pneumatic power, children can build a range of vehicles that have realistic, real-world functions, from automatic opening doors to powerful four wheel drive. From cranes to the latest supercar, each set can be rebuilt into another vehicle, expanding the play possibilities even further. The LEGO Technic building system makes it possible to build advanced real life functions like gearboxes, working piston engines and crane arms, which integrate with other LEGO bricks.

LEGO Technic Bucket Wheel Excavator

Experience the huge Bucket Wheel Excavator!

Enjoy building and operating this massive 2-in-1 Bucket Wheel Excavator, the largest LEGO Technic set to date! This awesome, meticulously detailed reproduction of a real-life mining excavator comes with a cool dark-blue and yellow colour scheme and an array of authentic features and functions, including hand-railed walkways, huge tracks and a detailed cab. Switch on the included Power Functions motor and you can activate the conveyor belts, rotate the massive superstructure and manoeuvre the colossal machine into position. Then activate the boom to lower the gigantic, digging bucket wheel and convey the mined material to the waiting mine truck. When you feel like another building challenge, rebuild it into a Mobile Aggregate Processing Plant.

  • This set offers an age-appropriate building experience for ages 12-16.

Features a LEGO Power Functions motor for an array of motorised functions, including forward and reverse driving, rotating bucket wheel, moving conveyor belts and rotating superstructure, plus a working bucket wheel boom.

Follow the mined material from the bucket wheel to the moving conveyor belts and all the way to the waiting mine truck!

Switch on the LEGO Power Functions motor and manoeuvre the huge tracked structure into position.

This LEGO Technic model is designed to provide an immersive and rewarding building experience.

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Customer reviews

4.6 out of 5 stars
1,367 global ratings

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Customers say

Customers find the toy building block set offers good value for money. They appreciate its impressive build quality and challenging build. The instructions are described as complex and satisfying. Many customers enjoy the fun and enjoyment of building it. The size is also appreciated, with many pieces and a large box. However, opinions differ on the motor power and build time.

AI-generated from the text of customer reviews

58 customers mention ‘Value for money’58 positive0 negative

Customers find the toy building block set offers good value for money. They say it's a great kit with lots of parts and is worth the money. The instructions are well-written, and their children enjoyed building it.

"...n’t have worried,as the instructions were fantastic,and it went together beautifully...." Read more

"...Visually impressive and presenting some new parts that will give new opportunities for custom creations...." Read more

"...The excavator when finished is well worth the 18 hours I spent making it as I did not want to make a single mistake. ...." Read more

"...of building the currently biggest Technics available together with a good price from Amazon made me dive in...." Read more

31 customers mention ‘Build quality’31 positive0 negative

Customers appreciate the build quality of the toy building blocks. They find it impressive when built, a top-quality construction set with plenty of building in it. It takes up a lot of space and is one of the biggest Lego Technic sets ever. The set has a lot of structural parts to build other stuff from, making it fun and long build.

"...nowhere near as hard to build as it looks,and it’s huge and impressive once it’s built.guaranteed to turn heads!" Read more

"...It is huge and a very satisfying build...." Read more

"...It comes in a massive box, has a really thick manual and is built in 8 subsections...." Read more

"Awsome bit of lego, my first proper challenge for myself age45+ , if there is one thing i have learnt is to read instructions don't assume you know..." Read more

28 customers mention ‘Build difficulty’21 positive7 negative

Customers find the build difficulty of the toy building blocks challenging and fun. They appreciate the complex design and detailed instructions, which have over 450 pages. The instructions are top-quality and easy to follow. Many reviewers mention it takes three afternoons to build, and they learn new building techniques.

"...to build and never got repetitive as some can do and every step was so satisfying and became so addictive...." Read more

"...-Benz Truck, the truck wins as it is hands down more fun and challenging to build and unlike this model it is based on an actual prototype rather..." Read more

"...part this kit is a behemoth, it dwarfs other technic kits, its a complex build, absolutely tones of gears and loads of moving functional parts...." Read more

"...It's heavy and very detailed and once you fine tune the gear positioning when you build it, it will run smoothly and quickly...." Read more

24 customers mention ‘Fun to build’24 positive0 negative

Customers enjoy building the toy building blocks. They find it satisfying once completed and enjoy watching the model take shape. The build keeps them busy and becomes addictive.

"...I have absolutely no regrets. The set was really enjoyable to build and never got repetitive as some can do and every step was so satisfying and..." Read more

"...time and don't rush it, the fun is the build and watching the thing take shape is great fun, highlight has to be attaching the bucket arm to the..." Read more

"...that's not already been said, it a magnificent kit, challenging and fun to build, even for a 27 year old...." Read more

"...Thoroughly enjoyable and great sense of accomplishment when completed...." Read more

20 customers mention ‘Size’14 positive6 negative

Customers appreciate the size of the toy building blocks. They find it large and have many pieces.

"...need to worry,it’s nowhere near as hard to build as it looks,and it’s huge and impressive once it’s built.guaranteed to turn heads!" Read more

"...It is huge and a very satisfying build...." Read more

"it is an impressive size for a lego set but it would be better if all the pieces were in it instead i am waiting for lego to send the 5 pieces that..." Read more

"...I'm learning many building techniques and the number of pieces is huge and will allow me to build my own big things without mixing pieces with other..." Read more

7 customers mention ‘Design’7 positive0 negative

Customers appreciate the design. They find it visually impressive, with new parts that allow for custom designs. The amount of parts makes it possible to create custom designs. Customers are impressed by the complexity and how it all combined to make a realistic-looking structure that dominates the room.

"...Visually impressive and presenting some new parts that will give new opportunities for custom creations...." Read more

"...and slow, so I would not call it sluggish but actually it is totally realistic. Full credit should go to the design team...." Read more

"...of it was quite challenging and he was very impressed by the complexity of the design and how it all combined to make a quite intricate working model..." Read more

"...massive, takes up loads of space, is a really tricky build and dominates the room...." Read more

11 customers mention ‘Motor power’6 positive5 negative

Customers have different views on the motor power. Some appreciate the full range of movements and gears, while others think the motor is underpowered for its purpose and needs more power.

"This set from Lego is amazing! There is an awesome use of gears to obtain a lot of different function with just 1 XL Motor...." Read more

"...Also the motor is too weak for the size and weight of the set so it moves very sluggish." Read more

"...The forward movement is also ok. what do you expect; a construction equipment going at the speed of a Porsche!...." Read more

"...Bit of a shame it only comes with 1 motor though." Read more

7 customers mention ‘Build time’3 positive4 negative

Customers have different experiences with the build time. Some say it runs smoothly and quickly after assembly, while others mention it needs a long time to complete and the gears slip.

"...It works but is very slow and the gears slip quite a lot...." Read more

"...That said it runs fine if slowly..." Read more

"...the motor is too weak for the size and weight of the set so it moves very sluggish." Read more

"...you fine tune the gear positioning when you build it, it will run smoothly and quickly...." Read more

Wonderful kit, and a pleasure to build
5 out of 5 stars
Wonderful kit, and a pleasure to build
What can I say that's not already been said, it a magnificent kit, challenging and fun to build, even for a 27 year old. I would whole heartedly recommend this to anyone who wants to get it. It's heavy and very detailed and once you fine tune the gear positioning when you build it, it will run smoothly and quickly. All in all a wonderful thing to behold, especially as it's now sat in my living room for all visitors to see!
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Top reviews from United Kingdom

  • Reviewed in the United Kingdom on 13 January 2019
    Style Name: Without additional batteriesVerified Purchase
    Have had my eye on this set for a while and decided to take the plunge when the price hit £140.

    I have absolutely no regrets. The set was really enjoyable to build and never got repetitive as some can do and every step was so satisfying and became so addictive. When you mount the bucket to the arm was a highlight, it all just fit into place and you could see where all the gears and wheels engaged with one another. As you went along it just got bigger and bigger and you wonder where it will stop, you're going to need a lot of room to display this model.

    Many reviews will tell you that the set is very slow when using the motorized functions and this is true, but when you see the amount of gearing on this thing you can understand why. It's also quite heavy so it's not really surprising so I would'nt count this as a negative.

    If I had to pick a negative with this set it's that there are quite a few stickers. Personally, for an expensive set I expect Lego to stop penny pinching and print the parts but that's probably never going to happen.

    So yes, a fantastic set. Whether you're a Technic fan or not you'll probably enjoy the finished product no end. You'll probably require an extra pair of hands on occasion and kids will probably require adult supervision.
    2 people found this helpful
    Report
  • Reviewed in the United Kingdom on 15 January 2018
    Style Name: Without additional batteriesVerified Purchase
    This is the largest Lego technic set available.I was initially apprehensive about ordering this kit,as it is very daunting,but I needn’t have worried,as the instructions were fantastic,and it went together beautifully.I did decide to alter the gear ratio of the bucket,as it was too highly geared as standard,and needed lowering,because the bucket was jamming up.This was easy to do using just the parts that came with the kit,slightly rearranged.

    Lego really should have done this modification in the form of an addendum to the instructions,I don’t know why they didn’t.

    Anyway,if you’re in two minds whether to buy this,you don’t need to worry,it’s nowhere near as hard to build as it looks,and it’s huge and impressive once it’s built.guaranteed to turn heads!
    One person found this helpful
    Report
  • Reviewed in the United Kingdom on 11 October 2016
    Style Name: Without additional batteriesVerified Purchase
    This set from Lego is amazing!
    There is an awesome use of gears to obtain a lot of different function with just 1 XL Motor.
    Otherwise this is even the weak point of this model: only 1 Motor (even if XL) for such a big and complex model it's just not enough and you will notice that some movements are not so fluid.
    Batteries must be of good quality and at full charge for best results.
    Visually impressive and presenting some new parts that will give new opportunities for custom creations.
    The model contain even a white mining truck very similar to set Lego 42035, anyway this is a more simple version of it.
    2 people found this helpful
    Report
  • Reviewed in the United Kingdom on 21 March 2017
    Style Name: Without additional batteriesVerified Purchase
    The spirit of LEGO technic is in its construction. As an AFOL I only build large sized sets. The excavator when finished is well worth the 18 hours I spent making it as I did not want to make a single mistake. . It is huge and a very satisfying build. The movements are a replication of the monster excavators that are steady and slow, so I would not call it sluggish but actually it is totally realistic. Full credit should go to the design team. I was pleasantly surprised that the excavator can rotate endlessly if left on a battery. The forward movement is also ok. what do you expect; a construction equipment going at the speed of a Porsche!. LEGO should continue giving us sets this engrossing each year.
    5 people found this helpful
    Report
  • Reviewed in the United Kingdom on 6 September 2017
    Style Name: Without additional batteriesVerified Purchase
    Its BIG. But you already know that. As a 62 year old newcomer to Lego I am amazed by the sophistication and complexity of the Lego Technics range. Since buying the Lego ideas Saturn V and the Yellow Submarine a couple of months back I have waded in and purchased the LEGO 42043 Technic Mercedes-Benz Truck and the LEGO 42054 Technic CLAAS XERION 5000 tractor and this set . I have to say I was in two minds about purchasing this as many folk have commented on the difficulties in making the power functions operate. Also, it frankly looks like some thing of a rejected prop from Thunderbirds. Still the challenge of building the currently biggest Technics available together with a good price from Amazon made me dive in. The build is split into 8 stages with components in numbered ( 1 - 8 ) plastic bags. Some stages have multiple bags for a given stage for example there are nine bags marked as '6' - this is biggest stage as it contains the 75 cm long bucket arm. Assembly instructions for the model are for the most part excellent and as there are 450 pages, plentiful.
    I did not find any of this build particularly challenging and my advice just take your time and don't rush it, the fun is the build and watching the thing take shape is great fun, highlight has to be attaching the bucket arm to the base caterpillar unit.

    Important: I did take care with the assembly to ensure that gears had room to move laterally as the instructions advise. I am pretty sure this is the reason some folk have reported problems with the power operation. The motor is a Lego XL but frankly it is being pushed to its limits driving this 3.5 kg beast and the sheer amount of friction being generated by all those gears is considerable. That said it runs fine if slowly ( geared downed a lot, to provide authentic feel and also the only way this much mass is going to be moved by that small a motor, but again I doubt the real thing that inspired this model holds any lap records!
    Driving the caterpillars is limited to forward/ backward i.e. no steering. Use of the power functions to drive, swivel upper stage around the base and power the bucket wheel and two conveyor belts is handled via two gear boxes and is not the most intuitive experience that said with practice you will get there.
    For comparison and based on my limited experience, if I had to choose between this and the LEGO 42043 Technic Mercedes-Benz Truck, the truck wins as it is hands down more fun and challenging to build and unlike this model it is based on an actual prototype rather than a generic hazy concept, on a good day both models can be found on Amazon for around £135 give or take. At this price point I think it represents good value for money and certainly for myself not disappointing.
    Customer image
    4.0 out of 5 stars Big and fun
    Reviewed in the United Kingdom on 6 September 2017
    Its BIG. But you already know that. As a 62 year old newcomer to Lego I am amazed by the sophistication and complexity of the Lego Technics range. Since buying the Lego ideas Saturn V and the Yellow Submarine a couple of months back I have waded in and purchased the LEGO 42043 Technic Mercedes-Benz Truck and the LEGO 42054 Technic CLAAS XERION 5000 tractor and this set . I have to say I was in two minds about purchasing this as many folk have commented on the difficulties in making the power functions operate. Also, it frankly looks like some thing of a rejected prop from Thunderbirds. Still the challenge of building the currently biggest Technics available together with a good price from Amazon made me dive in. The build is split into 8 stages with components in numbered ( 1 - 8 ) plastic bags. Some stages have multiple bags for a given stage for example there are nine bags marked as '6' - this is biggest stage as it contains the 75 cm long bucket arm. Assembly instructions for the model are for the most part excellent and as there are 450 pages, plentiful.
    I did not find any of this build particularly challenging and my advice just take your time and don't rush it, the fun is the build and watching the thing take shape is great fun, highlight has to be attaching the bucket arm to the base caterpillar unit.

    Important: I did take care with the assembly to ensure that gears had room to move laterally as the instructions advise. I am pretty sure this is the reason some folk have reported problems with the power operation. The motor is a Lego XL but frankly it is being pushed to its limits driving this 3.5 kg beast and the sheer amount of friction being generated by all those gears is considerable. That said it runs fine if slowly ( geared downed a lot, to provide authentic feel and also the only way this much mass is going to be moved by that small a motor, but again I doubt the real thing that inspired this model holds any lap records!
    Driving the caterpillars is limited to forward/ backward i.e. no steering. Use of the power functions to drive, swivel upper stage around the base and power the bucket wheel and two conveyor belts is handled via two gear boxes and is not the most intuitive experience that said with practice you will get there.
    For comparison and based on my limited experience, if I had to choose between this and the LEGO 42043 Technic Mercedes-Benz Truck, the truck wins as it is hands down more fun and challenging to build and unlike this model it is based on an actual prototype rather than a generic hazy concept, on a good day both models can be found on Amazon for around £135 give or take. At this price point I think it represents good value for money and certainly for myself not disappointing.
    Images in this review
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    38 people found this helpful
    Report

Top reviews from other countries

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  • Patricia Urdi
    5.0 out of 5 stars Espectacular
    Reviewed in Spain on 20 January 2024
    Style Name: Without additional batteriesVerified Purchase
    Lego nunca falla. La excavadora es genial . Las piezas vienen ordenadas por orden de montaje en bolsitas y las instrucciones vienen en varios idiomas. Esto hace muy ameno montarlo. Es bastante grande . Esta subida a una estantería tipo Ikea para que os hagáis una idea.
    El motor va a pilas. Esto es un poco inconveniente porque se gastan bastante rápido . Viene con un “cochecito” mas pequeño donde dejar los canglionesque recoge la excavadora.
    La recomiendo muchísimo. Nos ha encantado
    Customer image
    Patricia Urdi
    5.0 out of 5 stars Espectacular
    Reviewed in Spain on 20 January 2024
    Lego nunca falla. La excavadora es genial . Las piezas vienen ordenadas por orden de montaje en bolsitas y las instrucciones vienen en varios idiomas. Esto hace muy ameno montarlo. Es bastante grande . Esta subida a una estantería tipo Ikea para que os hagáis una idea.
    El motor va a pilas. Esto es un poco inconveniente porque se gastan bastante rápido . Viene con un “cochecito” mas pequeño donde dejar los canglionesque recoge la excavadora.
    La recomiendo muchísimo. Nos ha encantado
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  • Riyawin
    5.0 out of 5 stars Well engineered product and great delivery experience
    Reviewed in India on 14 November 2017
    Style Name: Without additional batteriesVerified Purchase
    Very well designed Lego Technic set! If you are a Technic fan you will never repent buying this Huge collection of parts (some unique) for your MOCs!
  • Tanex74
    5.0 out of 5 stars Bellissimo
    Reviewed in Italy on 9 June 2017
    Style Name: Without additional batteriesVerified Purchase
    Come sempre ottimo imballaggio e tempi di spedizione esemplari, nonostante il pacco arrivasse dal Regno Unito.
    Ma parliamo del lego: ho sempre amato i Tehnic e ne ho una folta collezione; ma da qualche tempo non ne compravo uno. Quando vidi questo modello, appena uscito, non mi entusiasmò molto e ne persi subito interesse, attirato da altri modelli. Il primo vero interesse avvenne quando vidi la scatola in un negozio: grande come i migliori technic usciti negli anni, ma lo spessore... esattamente il doppio! Incuriosito, con in testa domande del tipo: "ma quanti pezzi conterrà una scatola così?? " andai sul sito lego, dove si possono trovare e scaricare le istruzioni di montaggio. Un colpo di fulmine: entusiasmato dalla moltitudine di ingranaggi, quando lessi 3929 pezzi pensai: "mio!".
    Arrivata la scatola, immaginate un bimbo a Natale, nel vedere oltre 30 sacchetti numerati all'interno. Anche il libretto di istruzioni segue lo stile: solitamente nei technic (almeno fino a qualche anno fa) erano 3 libretti; questo è unico con ben 550 pagine!
    E la costruzione ha confermato il tutto: un modello enorme, con tanto di camioncino annesso, mi ha dato e mi sta dando molte soddisfazioni.
    Se proprio devo trovarci un difetto: il movimento sui cingoli non è molto fluido... certo tenendo conto del peso (6 kg)e della distanza tra motore e cingoli che si traduce in tanti tanti ingranaggi, ci può stare. Ma un motore in più ci poteva anche stare.
    Comunque i nastri funzionano ottimamente, e nel modello B tutto si muove in modo fluido.
    Se amate in Technic e volete un modello unico, fa al caso vostro. Se volete un modello mastodontico, fa al caso vostro. Se volete divertirvi, c'è tutto il necessario.
    Un saluto da Tanex e.. buon lego!
    Customer image
    Tanex74
    5.0 out of 5 stars Bellissimo
    Reviewed in Italy on 9 June 2017
    Come sempre ottimo imballaggio e tempi di spedizione esemplari, nonostante il pacco arrivasse dal Regno Unito.
    Ma parliamo del lego: ho sempre amato i Tehnic e ne ho una folta collezione; ma da qualche tempo non ne compravo uno. Quando vidi questo modello, appena uscito, non mi entusiasmò molto e ne persi subito interesse, attirato da altri modelli. Il primo vero interesse avvenne quando vidi la scatola in un negozio: grande come i migliori technic usciti negli anni, ma lo spessore... esattamente il doppio! Incuriosito, con in testa domande del tipo: "ma quanti pezzi conterrà una scatola così?? " andai sul sito lego, dove si possono trovare e scaricare le istruzioni di montaggio. Un colpo di fulmine: entusiasmato dalla moltitudine di ingranaggi, quando lessi 3929 pezzi pensai: "mio!".
    Arrivata la scatola, immaginate un bimbo a Natale, nel vedere oltre 30 sacchetti numerati all'interno. Anche il libretto di istruzioni segue lo stile: solitamente nei technic (almeno fino a qualche anno fa) erano 3 libretti; questo è unico con ben 550 pagine!
    E la costruzione ha confermato il tutto: un modello enorme, con tanto di camioncino annesso, mi ha dato e mi sta dando molte soddisfazioni.
    Se proprio devo trovarci un difetto: il movimento sui cingoli non è molto fluido... certo tenendo conto del peso (6 kg)e della distanza tra motore e cingoli che si traduce in tanti tanti ingranaggi, ci può stare. Ma un motore in più ci poteva anche stare.
    Comunque i nastri funzionano ottimamente, e nel modello B tutto si muove in modo fluido.
    Se amate in Technic e volete un modello unico, fa al caso vostro. Se volete un modello mastodontico, fa al caso vostro. Se volete divertirvi, c'è tutto il necessario.
    Un saluto da Tanex e.. buon lego!
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  • Guang Huo
    5.0 out of 5 stars great
    Reviewed in Australia on 10 June 2020
    Style Name: Without additional batteriesVerified Purchase
    marvel piece
  • 多々買い増す
    5.0 out of 5 stars キットはすばらしいです。保管、輸送方法や展示には難があります。
    Reviewed in Japan on 10 January 2017
    Style Name: Without additional batteriesVerified Purchase
    あまり長く書くこともありません。
    LEGO自体の評価は最高です。

    パーツ数がおよそ4000ピース(3929ピース)、重量6kgもあります。
    箱も非常に大きいです。
    ギミックも割りと面白かったです。

    購入に踏み切るにあたり、事前に場所を確保してください。
    店頭での購入は運ぶのがかなり厳しいです(もし店頭でのご購入の際には輸送を依頼することを強く推奨します)。
    また、amazonでの購入に当たっても、大きさ故に、梱包が、本当に!非常に!悪いです。
    運送業者さんも頭を抱えているようでした。
    ※amazonのマーケットプライスではなく、amazonプライムの発送を利用しています。
    うちに届いたものは輸送用ダンボールはグズグズ、ダンボールの中身は既に空いており、中身のパッケージの外箱もボコボコ。
    事前にamazonで購入しても、そうなることもあると想定しておいてください。

    これら輸送に関する評価は、本商品への正当な評価ではない為、星は5つです。
    amazonの輸送方法に問題があるというのが難ですので、その辺の注意、理解は必要になると思います。