The PA50 Pleatco Swimming Pool / Spa Replacement Filter Cartridge C-7656 FC-1240 is a high-quality cartridge filter designed for use in both above ground and in ground pools. Made with advanced point bonded filtration fabric by Pleatco, this cartridge fits models like Hayward C500 and Purex CF-50. With dimensions of 7" width x 19 3/4" height and an inner opening diameter of 3", it effectively replaces Unicel C-7656 and Filbur FC-1240 cartridges. Perfect for maintaining clean and clear water in your pool or spa, this filter cartridge ensures efficient filtration and helps keep your water crystal clear.