Unibear UB520120L Gold Heavy Duty Motorcycle Chain with Connecting Link (520 Pitch, 120 Link) Enhanced plate strength brings reliability for heavy duties. High tensile strength, non o-ring chain Applied Advanced heat treatment Process, strong resistance to impact Hi-tech heat treated alloy Steel, good wear resistance Pre-stretched and anti-fatigue. Solid rollers & bushes. Comes with spring clip master link ISO 9001:2008 quality management certificate