C20B-1 roller chain with straight side plate: 1, Material: 40Mn 2, Color: Natural 3, The kind of chain has many models C20B-1 roller chain with ... straight side plate' specification:1, Plate material: 40Mn; Pin: ... by advanced heat treatment with competitive price.5, Packing: a chain + a polybag + Brown box + a wooden case.6, MOQ: ...