This Atlas O Master PS-4427 Low-Side Covered Hopper is a great addition to any 1960s and later O Scale or O gauge freight train. Based on covered hoppers used to haul grain and other commodities requiring protection from the weather, it will look great in a consist or in a unit train of identical cars. This car features a detailed injection-molded body, realistic decoration, separately applied see-through roofwalks, metal grab irons, brake wheel and roof grab irons. This ready-to-run PS-4427 Low-Side Covered Hopper is ready to run on your 3-rail O Gauge railroad. It requires O-45 minimum diameter curves and comes equipped with 100-ton roller bearing trucks with rotating roller bearing caps and premium die-cast couplers.