Motorcycle sprocket 1:Excellent quality and competitive rate 2:Good quality 1045 steel, Hardness : 50 ... 420,428,520,428H, 525, 530 etcMaterial1045 steel, 1023 steel and 16MnSurface-finishingSandblasting, Dull polish, Galvanized, with the circle line ... .Heat treatment:High frenquency quenching and CarburizationPackaging:Blister card, Slide blister, Poly bag, sprockets and chain set box or according ...