Note: Fill the water to heavy duty pool wall bag to 1/2 or 3/4, to prevent it from freezing and expanding in winter, which could lead to bursting, The size of the mouth pool water bags fits most garden hose and taps,quick filling,with the double loop sagety value to ensure tightness, Or, fill them with sand for an even sturdier hold Easy Installation: Pool cover weights with hooks,easy to install. The pool water bags are designed to securely hold the pool cover in place and prevent it from being blown around. With 16 sturdy buckles, the pool cover weights can be easily fastened, making installation simpler and reducing the risk of them coming loose Leak-Proof Sealed Design: Featuring a tight-sealed edge and a leak-proof valve, these water bags are designed to prevent any leaks, keeping them filled and in place all season long Durable & Anti-freeze: Built from thick, high-quality PVC, these pool cover weights are designed to withstand harsh winters. They’re tear-resistant, durable, and won’t crack or leak, ensuring long-lasting use even in extreme weather Fit for Any Pool Cover: No matter if your pool cover is round, rectangular, or custom-shaped, these versatile water bags can adapt to fit. providing reliable anchoring for various pool sizes and shapes, versatile for all needs Note: Fill the water to heavy duty pool wall bag to 1/2 or 3/4, to prevent it from freezing and expanding in winter, which could lead to bursting, The size of the mouth pool water bags fits most garden hose and taps,quick filling,with the double loop sagety value to ensure tightness, Or, fill them with sand for an even sturdier hold