Hayward CX1100RE, NEW ECO-LINE CARTRIDGE, SAVE THE PLANET, Aladdin 19905, Unicel C-8610, Pleatco PA100, Filbur FC-1290 Star Clear II C-1100, Swimming Pool Filter Cartridge LENGTH 23 3/8 in, OUTER DIAMETER 8 1/2 in, INNER DIAMETER 4 1/16 in, 100 square feet, 154 pleats Replacement Cartridge fits: Hayward CX1100RE, Star Clear II C-1100, Unicel C-8610 Pleatco PA100, Filbur FC-1290, Aladdin 19905 PLEASE CHECK YOUR CARTRIDGE MEASUREMENTS FOR A MATCH MADE IN THE USA! This cartridge removes 100 ... 16 oz plastic bottles from the landfill.