allows you to capture free heat from the sun’s rays to effectively raise your pool water temperature. It’s an efficient and cost-effective method to heat your pool!! Superior Material - Made from precompounded polypropylene, a process which increases the materials resistance to UV light (lengthens service life substantially) Help Extend Pool Season - The pool pump pushes the water through the panel’s many tubes where it’s warmed by the sun and then returned into the pool. This system can raise the water temperature 6-10 degrees F and extend your pool season by weeks! (pls note pool pump not included) Tube on Web Design - The tube-web-tube design allows the sun heat to capture the most sun possible, maximizing square footage. It offers rigid flexibility, allowing panels to expand and contract with changing temps, giving it the strength needed to last Dimension - The Solar Pool Heater include 4' ft x 20' ft panel, made of durable polypropylene (Solar heater features 80 square feet of solar panels) *Installation kit required (Sold Separately)* BUY on Amazon for $169.99.00.