... Type:Roller chain with attachment WA2Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, ... 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series ... . Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...