Duplex roller chains for ANSI 80-2 1) material:40Mn 2) plate thickness:3.25mm 3) color:natural,black,blue,yellow ANSI 80-2 Aseries duplex roller chains(16B-2R)1)material ... chains :415,420,428,428H,520,530,630,25,25H3)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K-2 ... ,SA-1,SA-2,SK-A,SK-2 etc4)double pitch transmissions v& conveyor chains ...