O-Ring and X-ring Motorcycle Chain - Gold Plated 420,428,520,530,630 Alloy steel High ... tensile strength O-Ring and X-ring Motorcycle Chain - Gold PlaedThe service life of chain is greatly depended on the ... the no. 1 in Chinese chain association, be recommend to worldwide.- Model: 420,428, 428H,520, 520H, 525, 525H, 530, ... , Nickel, Copper O-Ring and X-ring Motorcycle Chain - Gold Plated 428,520,530