12MM Belt Width; 8MM Belt Pitch; 8M-12 Poly Chain GT2 Belt Style; 22 Teeth; 15.24MM Face Width; Bushed; 66.294MM Flange OD; 54.432MM OD; 56.032MM Pitch Diam; Keyway; 12.7 To 25.4MM Bushing Bore Range; 1008 Bushing; No Minimum Plain Bore