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Fits a 20×40 Ft Pool: Pool Cover Size: 22×42 ft; Suitable Pool Size: 18×36 ft. The actual cover size is 2ft larger than the ordered pool size, ensuring no stretching or ripping. Before ordering, please measure your pool dimensions first. Always select a cover based on your pool size. Ideal for most types of pools at home, garden, hotel, engineering to better protect your pool. High Strength PP Material: This inground pool cover enjoys a good reputation for its robust performance. Made of soft and tough polypropylene and use double-strapped and triple-stitched throughout. Complete Hardware Included: Comes with brass anchors, stainless-steel springs, and installation tools for easy assembly. Drill and tamp style brass anchoring system permanently secures anchors in concrete. The length of the rope is adjustable between 17.7-25.6 ft / 45-65 cm, according to the size of your swimming pool. Children/Pets Care: Strong tensile toughness of this swimming pool cover, this cover makes excellent contributions to reduce water evaporation and keep water warm in winter. Powerful Mesh Design: Tight mesh adopted by our 18×34 pool cover lets water pass through easily for the best drainage. Moreover, the scrim is tightly woven, allowing almost no sunlight to seep through the cover, thus retarding algae growth.