... .30mm 4.color:natural.black.blue.yellow 085-1 simplex roller chains 1.material:40MN/A32.pitch:12.700mm3.plate thickness:1 ... , 420H, 428, 428H, 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series ... and B series4. Silent chains: SC3,SC4,SC5,SC6,SC8 ...