Prototypes for the Broadway Limited HO Scale AAR 70-Ton 3-Bay Hoppers were everywhere on the railroads beginning in the 1930s. At their peak they made up about 6% of all open hoppers, and approximately 1.5% of the entire North American freight car fleet. The first of these cars appeared in the late 1930s, and several were still in service in the 1980s! In all, over 33,000 cars were built to this design, by numerous manufacturers and for over 30 railroads. The cars were used to transport coal, gravel, coke, and other bulk commodities across North America. AAR 70-Ton 3-Bay Hopper models feature detailed, injection-molded bodies with applied details, accurate decoration, metal wheels and magnetic knuckle couplers. They′re perfect for adding interest to your steam or diesel-era freights. AAR 70-Ton 3-Bay Hoppers are part of the line of Broadway Limited HO Scale rolling stock models.