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 : 40mn2) ... chain attachments:A-1,A-2.K-1,K-2,SA-1,SA-2,SK-A,SK-2 etc4)double pitch transmissions v ... )zincing6)heat treatment7)greasing8)quenching9)tempering10)oiling ANSI 80-2 Duplex roller chains