The WalthersMainline HO Scale AAR 70-Ton 3-Bay Open Hopper is based on a design adopted by the Association of American Railroads. The 70-ton capacity car was widely used to haul coal, but was also used to carry aggregates, minerals or ballast. Each model features nine side panels and roadname-appropriate flat or arched ends. The car is ready to run on your HO railroad with a die-cast metal chassis, correct 33′ RP-25 turned metal wheelsets and Proto MAX(TM) metal knuckle couplers. All New Tooling One time run of these road numbers, order now - limited quantity available! Car follows 70-ton, 9-panel AAR design 40′8′ inside length Available with or without end arches as appropriate Road-specific ends Ajax hand brake Die-cast chassis for excellent performance loaded or empty Correct 33′ turned metal RP-25 wheels Proto MAX(TM) metal knuckle couplers Add an instant load with Chooch Flexible coal loads The AAR 70-Ton 3-Bay Open Hopper is one of many WalthersMainline HO Scale hopper cars.