Robelle 3809-20 Premium 20g. Double-Chamber 8-Foot

8' Double Chamber 20 Gauge Water Tubes are constructed of extra heavy 20 gauge, puncture resistant vinyl. All of our water tubes have a conveniently placed, leak-proof valve that is easy to fill with a garden hose. Water tubes keep your pool cover in place all winter long. Water tubes should be filled half-way to prevent popping caused by expansion if the water freezes.   The red tabs can be made easier to close by warming them up with a hair dryer. Premium 20 gauge vinyl Double chamber design prevents the tube from rolling Leak-proof easy to fill valves Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item Warranty: 90 Day Woot Limited Warranty