The HO Walthers RTR 932-23554 2-Pack Union Pacific 60’ PS Auto Box Car Single Door is a pre-built model train box car designed for model railroads. This ready-to-run car features a single door design and is painted in yellow with the Union Pacific corporate roadname. Made of plastic and measuring 1:87 scale, this box car is suitable for operation on a two-rail system. Perfect for hobbyists looking to expand their collection of freight cars, this brand-new item from Walthers is a great addition to any model railroad setup.