The prototype of the car was converted by Burlington Northern from former Great Northern Thrall 61'6Bulkhead Flatcars by the addition of sides and lowering the end bulkheads in 1993 (Series 967000-967118). This HO 1:87 Burlington Northern 61'6 MOW Crosstie 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 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.