Thomas the Tank Engine No.1 is known for doing things better left for the bigger engines. Thomas eyes will move from side-to-side when running on HO/OO electrically operated track. International style hook and loop coupler on the rear. Six metal wheels. Detailed steam engine body design with a coal load. For use on HO/OO scale track (compatible with Bachmann s E-Z Track). Scale: HO 1/87 OO 1/76. Length: 4 (10.1m). Width: 1-1/4 (3.1cm). Height: 1-7/8 (4.7cm).