... Roller Chain 1.material:40MN/A3 2.pitch:38.100mm 3.plate thickness:4.80mm 4.color:natural.black.blue.yellow 24A Roller ... high strength7.pre-stretched and anti-fatigue8.produce as your sample or drawing9.sound quality, ... -Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent ... 35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot ...