The prototype of the car was built by the Johnstown America Corporation for the Burlington Northern from 9-10/1994 (Series 485020-485029), Cargill, Incorporated (CGAX) from 10/1995-1/1996 (Series 9519-9999) and JAIX Leasing Company (Johnstown America Corporation subsidiary) from 7-8/1996 (Series 96100-96249) This HO 1:87 Johnstown America Grainporter 2000 3-Bay Aluminum Covered Hopper STL files comes with the body, underframe body, 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!!!