Synchronous Pulley; 1/4" Belt Width; 2/25" Belt Pitch; MXL Belt Style; 21 Teeth; 0.389" Face Width; Rough Bore; 0.71" Flange OD; 0.515" OD; 0.535" Pitch Diam; No Keyway; No Bushing; Yes Minimum Plain Bore; 0.19" Max Bore

1" Belt Width; 1/2 Inch Belt Pitch; H Belt Style; 21 Teeth; 1-5/16" Face Width; Rough Bore; 3-5/8" Flange OD; 3.288" Outside Diameter; 3.342" Pitch Diameter; No Keyway; No Bushing; Yes Minimum Plain Bore; 1-11/16"