420 C quality chain: 1)OEM offered 2)material:40mn orA3 3)delivery ... chains 1,chain material:40mn2,the roller chain quality have A,B,C three grade3,Original Equipment Manufacture Industrial chain&Motorcycle ... 2 sides 3)Colors available:nature,blue,yellow,dark4)Good quality competitive price6)Deliver on time (15-25days)7)All ... to contact us if you have any questions short pitch420 C quality roller chain