Synchronous Pulley; 1" Belt Width; 1/2" Belt Pitch; H Belt Style; 28 Teeth; 1.312" Face Width; Bushed; 4.687" Flange OD; 4.402" OD; 4.456" Pitch Diam; Yes Keyway; 1/2 To 1-5/8" Bushing Bore Range; 2012 Bushing; No Minimum Plain Bore

37MM Belt Width; 14MM Belt Pitch; 14M-37 Poly Chain GT2 Belt Style; 28 Teeth; 44.196MM Face Width; Bushed; 137.16MM Flange OD; 121.971MM OD; 124.765MM Pitch Diam; Keyway; 12.7 To 53.975MM Bushing Bore Range; 2012 Bushing; No Minimum Plain Bore