This item was used about 20 years ago. I have not confirmed its operation. I do not remember where I purchased the parts, so some may not be genuine. I do not have much knowledge about the details of the parts, so I may not be able to answer your questions. If you are familiar with Mini 4WD and can make a judgment from the images, please consider purchasing. The metal parts, such as bearings, show varying degrees of damage, such as rust. The upper part of the body is not made of regular hard plastic, but a lightweight material, similar to that of a PET bottle, although I'm not sure if that's the correct description. The item will be packaged to prevent water damage and shipped in a cardboard box. Shipping will be via Yu-Yu Mercari Bin (Yu-Pack), which offers anonymity, tracking, and insurance for peace of mind.