Roller Chain 1.Standards:ISO/DIN/ANSI 2.Good quality and best delivery ... Type:Roller chain with attachment WA2Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, 428H ... ,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...