HO Scale generator or office trailer. this listing is for the open doors on one side of the trailer. Some assembly required and you can use CA glue bond together. Inside is hallow so if you wanted to add lights or smoke generator it can easily be done. HO scale 1 87. Design is by me and printed myself in PLA plastic. Everything in the broke down picture is included in your order. Wheel dolly is a separate item. This is a model and not a toy.