21MM Belt Width; 8MM Belt Pitch; 8M-21 Poly Chain GT2 Belt Style; 63 Teeth; 23.368MM Face Width; Bushed; 170.688MM Flange OD; 158.826MM OD; 160.426MM Pitch Diam; Keyway; 12.7 To 53.975MM Bushing Bore Range; 2012 Bushing; No Minimum Plain Bore

Synchronous Pulley; 90MM Belt Width; 14MM Belt Pitch; 14MX-90 Belt Style; 63 Teeth; 106.68MM Face Width; Bushed; 294.462MM Flange OD; 277.952MM OD; 280.746MM Pitch Diameter; Yes Keyway; 4030 Bushing; No Minimum Plain Bore