An integral part of any engine terminal, the roundhouse is a must for steam or diesel fleet inspections and repairs. This detailed six-stall building will hold engines up to 6-3/4" long and features movable doors, simulated brick siding, smoke jacks, windows, skylights, clerestory and window "glass." To create a larger complex, several of the kits can be combined to produce a 12-, 18-, or 24-stall roundhouse. 15 x 8-3/8".