... transmission chain 10A: 1)OEM offered 2)manufacture type:A /B/JIS series 3)hot sale market:mid east,south America,etc ... 1,chain material:40mn2,the roller chain quality have A,B ... motorcycle chains ,satandard or OEM are accepted 1)Type :420,420H,428,428H,530,630 and so ... on 2)Rivet:support 4sides or 2 sides 3)Colors available:nature,blue,yellow,dark 4)Good ...