C12B-1 roller chain with straight side plate: 1, Material: 40Mn 2, Color: Natural 3, The kind of chain has many models C12B-1 roller ... chain with straight side plate' specification:1 ... Bush and roller: 10# steel2, Pitch: 15.875mm; Plate thickness: 1.70mm; Roller Diameter: 10.16mm3, Color: Natural. blue, yellow and ...