Shock Cord w/Double Roller (Pair)Our Shock Cord with Double Pulley Block easily attaches to your boat and helps provide consistent tension to the halyard lines. With a double roller system, dual rigging and smooth halyard movement is a snap.Features: 12" of shock cord Shrink wrapped ends Corrosion-resistant hook clasps Sold in pairs 1-year limited warranty This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Brochure (pdf)