... thickness:1.5-9.5mm A series 50 short pitch industrial roller chain 1.material:40MN/A32.pitch range:1270-76.20mm3 ... , 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 ...