Buffalo Blizzard® 18 Gauge 1' x 8' Double Chamber Water Tubes For Swimming Pool Winter Covers - 16 Pack Item Number: A5940016 Our Water bags are the best way to keep your pool cover secure all winter long. The water bags are manufactured from quality heavy gauge vinyl treated with UV inhibitors and anti-bacterial and anti-fungus additives. They are designed to withstand sub-zero temperatures and we recommend that you use the single tubes for covers with water bag loops. Follow these simple steps when using water bags: Fill water bags 1/2 to 3/4 full to allow room for expansion due to freezing. Note: Our water bags are 1 ft. wide before adding water. If you are having trouble closing the valves on your water bags - try this trick! Soak them in warm water and they will close easily. Heavy-duty 18 gauge vinyl Each water tube measures 1' x 8' ft long and is a double chamber water tube Just use a garden hose to fill water tubes (remember only fill halfway to allow for ice expansion) U.V. Treated Color: Blue Auction is for 16 (1' ft wide x 8' ft long double chamber water tubes) Benefits: Secure Your Winter Cover - Keep your winter cover on your swimming pool during the cold and windy winter season with the use of water bags. All water tubes come with a leak-proof valve that is conveniently placed for ease of filling with a garden hose. Use these bags to weigh down your winter cover on your concrete or decking for an in-ground or above-ground swimming pool. Designed to Defend - These water bags have been designed to withstand sub-zero temperatures, manufactured from quality heavy gauge vinyl and treated with inhibitors to prevent fading in the sun. Proper Water Bag Usage - Fill water bags ½ - ¾ full to allow room for water freezing expansion during the cold seasons. If you are having trouble closing the valves, try soaking them in warm water. Easy To Handle - Close your swimming pool without any hassle with the help of these lightweight, easy to carry water tubes. Once you have your winter cover in place, slide these bags through your cover's water bag loops before filling them with water.