NS Heritage 3-Bay Open Hopper 3-Pack Lackawanna, Central Railroad of New Jersey, Erie Railroad. Features •Die-cast metal sprung trucks and operating couplers •Hidden uncoupling tabs •Rotating bearing cars •Removable single-piece coal load Gauge: Standard O Scale Dimensions: Single Hopper Length: 12 ¾” RailLine: 1 Each: Lackawanna, Central Railroad of New Jersey, Erie Railroad. Minimum Curve: O-31