Kinds of Roller Chain 1.material:40MN/A3 2.pitch:6.0- ... .0mm 4.color:natural.black.blue.yellow Kinds of Roller Chain 1.material:40MN/A32.pitch:12.700mm3.plate thickness: ... 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3, ... chains: 25NP,35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below: 1.Shot peening2.Bluing3. ...