Roller Chain 1.Standards:ISO/DIN/ANSI 2.Good quality with best delivery ... .Made Style:Manufacture and OEM Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, 428H ... ,40NP,50NP10. Coupling chainsThe Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...