Harris Pool Products Premium Water Blocks for In-Ground Swimming Pool Winter Covers - Durable Alternative to Water Bags | Stackable Design for Easy Summer Storage (18 Pack) | Perfect for Pool Winterization and Protection

Harris Pool Products Water Blocks For In-Ground Swimming Pool Winter Covers | Longer Lasting Alternative To Old-Fashioned Water Bags! | Water Blocks Stack For Easy Summer Storage. 20% WIDER THAN OTHER WATER BLOCKS! Our patented modern and simple design features a low profile and appealing shape to complement your pool. Our blocks are 3’ long x 7.25” wide x 3.25” in depth. We specifically engineered our blocks to be 20% wider than the competition to ensure that our blocks do not move or flip over during windy conditions. LONGER LASTING ALTERNATIVRE TO OLD-FASHIONED, LESS EXPENSIVE WATER TUBES! Our patented water blocks are crafted from high-density, molded and formable polyethylene engineered to survive the toughest winters! All blocks include an exclusive UV inhibitor that protects our water blocks from fading or cracking. SIMPLE TO USE AND EASY TO HANDLE! Simply place the water blocks around the edge of your pool cover, fill with water from your garden hose and snap on the top lid! HARRIS POOL PRODUCTS WATER BLOCKS ARE NESTABLE AND EASILY STACK FOR EASY SUMMER STORAGE! TO ALLOW ROOM FOR EXPANSION DUE TO FREEZING, only fill water blocks ¾ full.