Unibear UB525120L 525 Pitch, 120 Gold Heavy Duty Motorcycle Chain with Connecting Link, Japanese Technology 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. ISO 9001:2008 Quality Management Certificate