Lionel The Polar Express 20th Anniversary American Flyer S Gauge Boxcar will be a great addition to any American Flyer S Gauge layout. Boxcar showcases the special 20th Anniversary Polar Express logo and the unique Believe stamped boarding pass. It is compatible with all American Flyer S Gauge Systems, and features a metal frame, diecast trucks, operating couplers, and opening side doors. Lionel S Gauge products are approximately 1:64 in scale and are sold under the name American Flyer. Lionel S Gauge requires AF FasTrack due to being narrower than O, has two rails and supports American Flyer and other S Gauge cars only. S Gauge product and track are recommended for train hobbyist and collectors who prefer a scale smaller than our Traditional O Gauge or O Scale line.