Synchronous Pulley; 1-1/2" Belt Width; 1/2 Inch Belt Pitch; H Belt Style; 21 Teeth; 1-13/16" Face Width; Rough Bore; 3-9/16" Flange OD; 3.288" Outside Diameter; 3.342" Pitch Diameter; No Keyway; No Bushing; Yes Minimum Plain Bore; 1-