50MM Belt Width; 8MM Belt Pitch; 8M-50 Synchronous Plus Belt Style; 56 Teeth; 53.975MM Face Width; Bushed; 151.13MM Flange OD; 141.224MM OD; 142.596MM Pitch Diam; Keyway; 12.7 To 66.675MM Bushing Bore Range; SK Bushing; No Minimum Plain Bore