Synchronous Pulley; 21MM Belt Width; 8MM Belt Pitch; 8MX-21 Belt Style; 28 Teeth; 30.48MM Face Width; Bushed; 81.458MM Flange OD; 69.698MM OD; 71.298MM Pitch Diameter; Yes Keyway; 14 To 25MM Bushing Bore Range; 1108 Bushing; No Minimum Plain Bore