... .6-17.0mm 4.color:natural.black.blue.yellow B series roller chains 1.material:40MN/A32.pitch:12.700mm3.plate thickness ... , 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3,SC4,SC5,SC6,SC8 ... ,SC105. PIV chains: A0,A1,A3,A4 ...