... -2000 2.Material:A3#and1045 # 3.OEM Products and Good quality 4.26-year manufacturing Main information about ... 428,520,428H, 525, 530 etcMaterial1045 steel, 1023 steel and 16MnSurface-finishingSandblasting, Dull polish, Galvanized, with the circle line ... treatment:High frenquency quenching and CarburizationPackaging:Blister card, Slide blister, Poly bag, sprockets and chain set box or according to your ...