Lionel The Polar Express Combine HO Gauge Model Train Car will be a great addition to any HO Gauge layout. Car has a snow-covered roof with footprints, is decked in the famous Polar Express colors, and houses the Polar Express logo. Lionel HO Gauge are 1:87 in scale, are half the size of the traditional O Gauge and have become the most popular model railroad scale in the world today. These are small enough to build a gratifying layout in an efficient space and are large enough to illustrate all the great details. HO Gauge products operate on a 2-Rail HO FasTrack System that has a fantastic exemplary look and contains a quick easy snap-together connection. Compatible with Lionel HO Gauge Systems, features metal wheels, metal knuckle couplers, and LED interior flicker-free lighting.