50' Plug-Door Box Car -NORFOLK SOUTHERN #650012 - HO Scale. The Plug Door Box Car has a door system that closes with a final inward movement that seals the door flush with the interior of the box car. The design seals the door much better that a traditional sliding door box car. Plug Door Box Cars were used by a wide variety of railroads and other commercial companies. Bachmann's Plug Door Box Cars come in a variety of colors and road names. Each car is fully assembled and features; Highly Detailed Painted Bodies with Precision Graphics (where applicable), Blackened Machined Metal Wheels with RP 25 Contours, Magnetically Operated E-Z Mate Couplers, Non-magnetic Blackened Brass Axles with Needle-point Bearings, Celcon Trucks, and Added Weight for Optimum Tracking Performance