This is a kit for an N scale 55 ton U channel hopper. It will require trucks and couplers - I recommend Micro Trains 1001 Bettendorf trucks, and MTL 905 Z scale couplers. There is also a channel on the bottom of the car to add weigh, this will significantly improve its tracking. This model is printed with all grab irons. They will print and, they will survive shipping, but be careful when cleaning and painting the model, they are very fragile! Several roads rostered these cars; Western Maryland, Boston and Maine, and Potomac Eddision where the largest purchasers of these cars.