Robelle 3811-BLK-06 6-Pack Double Chamber No-Roll Deluxe 16 6-Pack, Black Product Details Product Dimensions: 120 x 10 x 6 inches Item Weight: 1.8 pounds Manufacturer: Robelle Industries Country of Origin: China Item model number: 3811--BLK-06 Is Discontinued By Manufacturer: No 6-Pack Black 10 ft. Double Chamber 16 Gauge Pool Cover Weights Heavy-Duty 16 Gauge Vinyl Construction - 30% Heavier Than Industry-Standard Double Chamber Design Prevents Rolling Prevents Winter Pool Cover From Falling Into Pool Fill Halfway With Water to Allow For Ice Expansion - If you have trouble closing the valve please use a hair dryer to loosen before closing. 10' Double Chamber Water Tubes are constructed of heavy-duty 16 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. 6 Pack.