Synchronous Pulley; 50MM Belt Width; 8MM Belt Pitch; 8M-50 Belt Style; 28 Teeth; 60.452MM Face Width; Bushed; 81.458MM Flange OD; 70.079MM OD; 71.298MM Pitch Diameter; Yes Keyway; 19 To 22MM Bushing Bore Range; JA Bushing; No Minimum Plain Bore