... anti-fatigue8.sound quality,reasonable price and prompt delivery are what we persue9.Packing:1pc packing in PP bag,white inner ... ,can print your own logo Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, ... ,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8 ...