Duplex roller chains for ANSI 80-2 1) material:40Mn 2) plate ... color:natural,black,blue,yellow ANSI 80-2 Aseries duplex roller chains(16B-2R)1)material : 40mn2)pitch : 25.4mm3 ... heavy series2)motorcycle chains :415,420,428,428H,520,530,630,25,25H3)short pitch conveyor roller chain attachments:A- ... SK-A,SK-2 etc4)double pitch transmissions v& conveyor chains :2040,2042,2050,2052,2060,2062,2060H,2062H,2080 ...