The 50′ ACF 5250 Centerflow covered hopper hauled plastic pellets, grain and feed from the 1960s into the 2000s. Based on the American Car & Foundry 5,250 cubic foot capacity design, decorated models feature trough or round hatches and gravity or pneumatic gates as appropriate. These models feature: See-through running boards Thin-profile roofwalk, stirrups, end ladders and platforms Correct 36′ turned-metal wheelsets Proto MAX(TM) metal knuckle couplers Undecorated version includes only trough hatches and gravity gates.