AAR 70 Ton 3-Bay Open Hopper w/Standard Ends & Coal Load - Ready to Run -- 3-Pack, Denver & Rio Grande Western #10911, 18934, 18963 (black, Flying Gran

An industry standard since the 1930s, the 3-bay hopper was adopted as an AAR recommended design. Although offering greater carrying capacity than flat-sided cars, the joints were easily damaged by sulfuric acid (created by wet coal), and the cars fell out of favor by the mid-1950s as repair costs mounted. Cars feature: * True scale dimensions with accurate details * Weighted, detailed underframes * Equipped with AccuMate(R) Knuckle Couplers * Trucks equipped with free-rolling metal wheels * Accurate painting and lettering