The prototype of the car was built by the Greenville Steel Car Company for the Southern Railway from 9-11/1970 (Series 133200-133449) This HO Scale 1:87 Greenville 100-Ton HS-46 Woodchip Hopper STL files comes with the body, brake platform, brake wheel and coupler box covers. The only thing that you need to complete this model is some 100-ton rolling bearing trucks with 36' 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 coupler boxes. Note these STL files is for personal use only and not to be commercially reproduced!!!