TACO Marine Cord w/Glass Eye Pair Shock. Smooth halyard line movement that limits "line creep" is what you get with TACO Marine's Glass Rings with Shock Cord. Specifications for TACO Marine Shock Cord w/Glass Eye Pair: Manufacturer: TACO Marine Size: One Size Color: Black Quantity: 2 Features of TACO Marine Shock Cord w/Glass Eye Pair Provides needed tension on halyard lines Lasts longer than plastic Package Contents: TACO Marine Shock Cord w/Glass Eye Pair TACO Marine COK-0021-2: Cord w/Glass Eye Pair Shock