Bachmann Trains Thomas And Friends - Spencer Engine With Moving Eyes Build your Thomas & Friends collection one friend at a time with this highly detailed locomotive Metal wheels Performs best on 18" radius curves or greater Runs on HO Scale Track International style hook and loop couplers Build your Thomas and friends collection one friend at a time Compatible with Bachmann HO scale E-Z track and other popular brands of HO scale track Metal wheels International style hook and loop couplers HO scale