VEVOR Pool Cover Water Bags, 5 Packs 8 Ft, Double Chamber Pool Cover Water Tubes with Reflective Strips, 0.3mm Thick PVC Bags Weights with Leakproof Screw Cap, for Winter Inground Swimming-Pool CoversLeak-Resistant Pool Cover BagsPremium PVC BuildUser-Friendly DesignHawaiian Style with Safety StripsAll-Season DurabilityDual-Chamber Anti-Roll StabilityThickness: 0.01 inch / 0.30 mm,Welding Process: Edge High-Frequency Welding, 0.59 inch / 1.5 cm width,Item Model Number: SSPCWB-12,Set Includes: 5-Piece Set,Product Dimensions: 94.49 x 11.81 inch / 2400 x 300 mm,Chamber: Dual Chamber,Net Weight: 5.62 lbs / 2.55 kg