420 C quality chain: 1)OEM offered 2)material:40mn orA3 3)delivery ... thickness pitch 420 1.4 12.700mmremark Roller chains 1,chain material:40mn2,the roller chain quality have A,B,C three grade3 ... 2 sides 3)Colors available:nature,blue,yellow,dark4)Good quality competitive price6)Deliver on time (15-25days)7)All of ... contact us if you have any questions short pitch420 C quality roller chain