Use these heavy-duty water tubes to hold your in-ground pool's cover in place and keep your pool protected during winter months. Made of heavy-duty vinyl that is 35% stronger than competing brands, these single water tubes are strong and puncture-resistant to ensure they’ll last for years. The double heat-sealed seams feature a full 1/4-inch overlap to prevent splits, and their no-leak valves keeps them full for the entire winter. Simply fill these tubes with a garden hose, put them in place to hold your winter cover in down, and forget about them until spring. Available in 8-foot and 10-foot lengths, these single tubes can be bought individually or in packs of six at a discounted rate.