LIONEL NORTHERN PACIFIC 15 ALUMINUM 4 CAR PASSENGER SET. O GAUGE THREE RAIL. 6-19167 VISTA DOME COACH CAR. 6-19168 VISTA DOME COACH CAR. 6-19169 VISTA DOME COACH CAR. 6-19170 VISTA DOME DINER. Die-cast operating knuckle couplers. Metal wheels & axles. Each car length: 15.