2 pack savings Hayward CX800RE, CX1500RE, Star Clear II C800 ALL AMERICAN Replacement Cartridges, Unicel C-8600, Pleatco PA80, Filbur FC-1280 Swimming Pool Filter Cartridge PLEASE DOUBLE CHECK ... DOES YOUR CARTRIDGE MATCH THESE MEASUREMENTS ??? LENGTH: 17 3/8 inches ... OUTER DIAMETER: 8 1/2 inches ... INNER DIAMETER: 4 1/16 inches // 75 square feet ... 154 pleats Replacement Cartridge fits: Hayward CX800RE, STAR CLEAR C-800, CX1500RE All American 8004, Unicel C-8600, Pleatco PA80, Aladdin 17507, Filbur FC-1280 MADE IN THE USA!