40 Quad Hopper Car - CSX #141944 (gray & yellow) - HO Scale. Quad Hopper Cars were used by many railroads, and were designed to transport Coal across the United States. Bachmann Quad Hopper Cars come in a variety of colors and road names. Each car is fully assembled with a removable coal load and detailed hopper interior. Features include; 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