RK 520 XSO X-RING -120 links (Silver/Gold)

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- Pro X-ring chain lasts five to eight times longer than standard chain

- Provide two more lubricant pools than conventional O-rings for longer life

- Lubricated with specially formulated, vacuum injected U-grease locked in by tough Nitrile Butadine rubber X rings

- Polished and shot-peened link plates

- High tensile strength ensures reliable performance