... : Blue 3,Standard: ANSI, GB, ISO, DIN 60-1 Roller chain with double attachment's specification:1, Plate material: 40Mn; Pin: 40Cr ... made by advanced heat treatment with competitive price.4, Standard: ANSI, GB, ISO, DIN5, Packing: a chain + a poly bag + individual box ... + wooden case6, Delivery time: 50 days 60-1 roller chain with 1 attachment