NSC Aggregate Hoppers N and HO Scales 3D print model

3D printable National Steel Car Aggregate Hoppers is two lengths in both HO 1/87 and N 1/160 scales. The cars just require trucks couplers. There are three varieties of the shorter car with handrail and air reservoir differences. Use 33" wheels for proper coupler height. New files with extra details, separate hopper doors, and more universal HO coupler boxes added 8-2-25.