... :420/428/530/630 etc 3)suitable for many mod 1,chain material:40mn2,the roller chain quality have A,B,C three ... grade3,Original Equipment ManufactureIndustrial chain&Motorcycle chainWe are manufacturing all kinds of motorcycle chains ,satandard ... are accepted 1)Type :420,420H,428,428H,530,630 and so on 2)Rivet:support 4sides or 2 sides 3 ...