The prototype of the car was built by the Thrall Car Manufacturing Company for the Southern Railway from 2-3/1977 (Series 139875-139999) This HO 1:87 Thrall 100-Ton Woodchip Gondola STL files comes with the body, A and B platforms, brake wheel and coupler box covers. The only thing 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.