Fuel tank found on Canadian RS23 and RSC24 diesels. Each tank is 63mm wide by 37mm long and 19mm high. The top and bottom of the tank are open both to offset printing cost and to provide room for a speaker or decoder installation if so desired.
This part is available in a variety of different materials. Be sure to read Shapeways notes on each material before ordering to be sure you are requesting the right one for your project.