60-1 chain with double attachment: 1, Material: 40Mn 2, Color: Blue 3,Standard: ANSI, GB, ISO, DIN 60-1 Roller chain with double ... attachment's specification:1, Plate material: 40Mn; Pin: 40Cr; Bush ... , ISO, DIN5, Packing: a chain + a poly bag + individual box + wooden case6, Delivery time: 50 days 60-1 roller chain with 1 attachment