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 couplers. There is also a channel on the bottom of the car to add weigh, this will significantly improve its tracking. This model has holes printed for all grab irons. I recommend BLMA 18" drop grab irons. The long grab irons can be fabricated from .008 phosphor bronze wire from Tichy. Several roads rostered these cars; Western Maryland, Boston and Maine, and Potomac Eddision where the largest purchasers of these cars.