The POOLPURE PLF106A Filter is a high-quality filter cartridge designed to replace Hayward CX880XRE and Pleatco PA106-PAK4 filters. It is compatible with various brands such as Unicel, Waterway, Ultral, Filbur, and Pentair. With a material area of 106 sq. Ft and an outside diameter of 7, this filter is suitable for both above ground and in ground pools. Made with trilobal filtration fabric, it offers easy installation, is salt water compatible, and easy to clean. This unit includes 4 cartridges, each with a length of 25 1/2″ and a bottom opening of 3″.