HO Scale PUP Generator Trailer. Want to customize your trailer to your specific wants/needs/design? Upload your design and we will add it to this one of a kind PUP trailer. This trailer comes with bottom doors one open and one closed. If you would like to add both bottom doors open or closed for an additional fee. Stairs are sold separately.  Comes as a Kit for custom assembly.  Designed and created by myself. This is a Model and not a Toy. note: custom graphic printing will cause a slight delay in shipping out order. Below photos you will see the button to upload your image before purchasing (if you are on PC).