Synchronous Pulley; 21MM Belt Width; 8MM Belt Pitch; 8MX-21 Belt Style; 140 Teeth; 30.48MM Face Width; Bushed; 354.914MM OD; 356.514MM Pitch Diameter; Yes Keyway; 14 To 65MM Bushing Bore Range; 2517 Bushing; No Minimum Plain Bore