Detailed Product Description roller chain(A series roller chain):1) we can supply many types chain,simplex, douplex and triplex roller chains, we also can produce according to your drawing2) color: blue, black,natural, yellow,3). material: alloy stell with using the advanced heat treatment.4) high quality with competitive price, and good workmanship5) it strictly conform to ISO,ANSI,GB,BS,DIN and ...