C12B-1 roller chain with straight side plate: 1, Material: 40Mn 2, Color: Natural 3, The kind of chain has ... -1 roller chain with straight side plate' specification:1, Plate material: 40Mn; Pin: 40Cr; Bush and roller: 10# steel2, Pitch: 15 ... : Natural. blue, yellow and black are available.4, It is made by advanced heat treatment with competitive price.5, Packing: a chain ...