C20B-1 roller chain with straight side plate: 1, Material: 40Mn 2, ... 3, The kind of chain has many models C20B-1 roller chain with straight side plate' specification:1, Plate material: ... ; Pin: 40Cr; Bush and roller: 10# steel2, Pitch: 31.75mm; Plate thickness: 4.5/3.5mm; Roller Diameter: 19.05mm3, Color: Natural ... .6, MOQ: 500M7, Delivery time: 50 days. BS roller chain with straight side plate(C20B-1)