The prototype of the car was built by the Pullman Standard Car Manufacturing Company for the Southern Railway from 7-9/1979 (Series 85000-85499) and then NS (Series 245000-245490) This HO 1:87 Pullman Standard HCS-25 3-Bay Covered Hopper STL files comes with the body, roof, roof walkway, 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 for the coupler boxes. Note these STL files is for personal use only and not to be commercially reproduced!!!