... 1.ribbonfil for chain(410,428,428h) 2.material: 20Mn,20#,20CrMo,20CrMnMo 3.thickness and width is custom tailored NameNoMaterialChemistry ... 20Mn,20#,20CrMo,20CrMnMo ribbonfil for motorcycle chain,bicycle chain(410,428,428H) . The thickness and width of ribbonfil and ... 10 years' chain material and components produce experience,it is the largest production base in chain material producing and ...