1)Engineered POLYURETHANE cord powerful, soft and elastic cord

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2)Machine double COPPER swivels

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3)Smooth rotating nylon cuff and rail saver swivel assembly

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4)MULTIPURPOSE-Useful for surfboard and long board

nProsea SL01S Soft and Elastic Material Surfboard Leashes with Double Copper Swivels Surfing Leashes Diameter Φ 5.5mm and 6ft long