21MM Belt Width; 8MM Belt Pitch; 8M-21 Poly Chain GT2 Belt Style; 80 Teeth; 23.368MM Face Width; Bushed; 213.868MM Flange OD; 202.108MM OD; 203.708MM Pitch Diam; Keyway; 12.7 To 68.263MM Bushing Bore Range; 2517 Bushing; No Minimum Plain Bore