Synchronous Pulley; 12MM Belt Width; 8MM Belt Pitch; 8MX-12 Belt Style; 180 Teeth; 21.59MM Face Width; Bushed; 456.768MM OD; 458.368MM Pitch Diameter; Yes Keyway; 14 To 65MM Bushing Bore Range; 2517 Bushing; No Minimum Plain Bore