This design is based on the prototype of Pullman Standard 50'6 MOW Material Boxcar N&W #517847 that I seen in person. This HO Scale 1:87 Pullman Standard 50'6 MOW Material Boxcar STL files comes with the body, frame, side wheel, brake wheel and coupler box covers. The only thing that you need to complete this model is some 70-ton rolling bearing trucks with 33' metal wheels and metal couplers of your choice. Also you need 2-56 x 1/4 phillips pan head screws for the trucks and 2-56 x 1/8 phillips pan head screws for the coupler boxes. Note these STL files is for personal use only and not to be commercially reproduced!!!