Guardian Pool Filter Cartridge Replaces Hayward CX500RE Star Clear C500 PA50 C-7656 FC-1240 MADE IN THE USA POOL AND SPA FILTER Guardian Filtration Products 719-111  New in factory packaging Replaces: Pleatco PA50, Unicel C-7656, Filbur FC-1240 Measurements: Diameter: 7", Length: 19-3/4", Top: 3" open hole, Bottom: 3" open hole Filter Area: 50 sq. ft. Filter Material: Reemay 4 oz. (4 oz. media has a longer filtration life than the standard 3 oz. material)