Synchronous Pulley; 1" Belt Width; 1/2" Belt Pitch; H Belt Style; 20 Teeth; 1.312" Face Width; Bushed; 3.256" Flange OD; 3.129" OD; 3.183" Pitch Diam; Yes Keyway; 1/2 To 1-1/4" Bushing Bore Range; 1210 Bushing; No Minimum Plain Bore