The square ground cover protects the sensitive floor from dirt and minimizes wear on the underlying surface. Additionally, it provides initial protection against excessive water overflow. , , Product Information, Suitable for all round and rectangular Fast-Set pools with a diameter as well as Steel Frame pools (steel frame pools) with a diameter of up to 457 cm, Sturdy PE cover to protect the pool floor, Material: Polyethylene, Durable material for extra protection of the pool floor