HPI Aqua Master 18'x36' Rectangle Solid Safety Cover - weighs half as much as vinyl safety covers and is twice as strong. This lightweight solid safety cover will never warp or dry out and crack like vinyl safety covers. The material used to construct this cover blocks 100% of sunlight and will never fade or stain. Keeping sunlight out of your pool will yield a clean pool when it is time to open your pool in the spring. The Aqua Master Solid Safety Cover is constructed to both look great in your backyard and keep intruders out of your pool. The solid material is secured with maximum strength straps, triple stitched for the highest performance and including a high-grade rub strip to prevent wear and tear. Our HPI Aqua Master covers are available with a partial drain panel (placed in the center of the cover). All HPI safety covers are ASTM rated and put through a stringent quality control inspection. All our covers include concrete brass anchors, stainless steel springs, covers for springs, installation tool, and storage bag. In order to install this cover you will need at least 3' ft of concrete. If you have pavers or wood deck you will need special hardware.