... :Excellent quality and competitive rate 2:Good quality 1045 steel, Hardness : 50-60HRC 3:Abrasion resi Main information about our motorcycle sprocket ... .....420,428,520,428H, 525, 530 etcMaterial1045 steel, 1023 steel and 16MnSurface-finishingSandblasting, Dull polish, Galvanized, with the circle line in ... offer: OEM Service Offered Design Service Offered Buyer Label Offered Motorcycle clutch gear