Bowser HO Scale ready-to-run 55-Ton Fishbelly Hoppers are based on typical cars used by railroads serving coal mines and for hauling aggregates. The cars operated from the 1930s to the 1970s and beyond in work train service. These layout-ready cars feature accurate decoration, molded details, free-rolling trucks with metal wheels and magnetic knuckle couplers. The 55-Ton Fishbelly Hopper is a great addition to your coal-hauling, late-steam and classic-diesel-era car fleet. The Fishbelly Hopper is part of the entire line of Bowser HO Scale ready-to-run freight cars.