Pleatco PA80-M Replacement Cartridge for Hayward Star-Clear II C800 Star-Clear II C1500 (MICROBAN), 1 Cartridge Replacement cartridge for Hayward star-clear II, c800 star-clear ii and c1500 models 50 Percent open ABS free flow cores maximize water flow through reemay filter media Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span Replaces unicel C-8600 and filbur FC-1280; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algae Measures 8-1/2-inches in diameter by 17-3/8-inches in length and 4-inches of top and bottom hole diameters