21MM Belt Width; 8MM Belt Pitch; 8M-21 Poly Chain GT2 Belt Style; 33 Teeth; 23.368MM Face Width; Bushed; 90.576MM Flange OD; 82.423MM OD; 84.023MM Pitch Diam; Keyway; 12.7 To 42.863MM Bushing Bore Range; 1610 Bushing; No Minimum Plain Bore

20MM Belt Width; 8MM Belt Pitch; 8MGT-20 Powergrip GT2 Belt Style; 33 Teeth; 21.59MM Face Width; Bushed; 96.774MM Flange OD; 82.652MM OD; 84.023MM Pitch Diam; Keyway; 12.7 To 31.75MM Bushing Bore Range; 1210 Bushing; No Minimum Plain Bore