MTH PREMIER ROCK ISLAND STREAMLINED RIBBED SIDES 18. 5 CAR PASSENGER SET. O GAUGE 3 RAIL. Comes in original box. LIGHTS AND COUPLERS ARE WORKING.. BOX IS IN ROUGH SHAPE WITH WATER DAMAGE. LITTLE IF ANY TRACK TIME. Die-cast operating metal couplers. End of car diaphragms. Each Car Measures 18 long. Operates on O-42 or greater curves.