... delivery time 3.Made Style:Manufacture and OEM Industiral Roller chain ,Main products as the following: 1.Motorcycle Chains: 25H ( ... -Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3,SC4,SC5,SC6,SC8 ... . Nickel-plated chains: 25NP,35NP,41NP,40NP,50NP10. Coupling chainsThe Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4 ...