Pleatco PWWCT75-M Replacement for Waterway Clearwater II Above-Ground Pool Cartridge (MICROBAN), 1 Cartridge Replacement for waterway clearwater II above-ground pool cartridge 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-8411 and filbur FC-1255; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 8-15/16-inches in diameter by 17-3/8-inches in length and 4-inches of top and bottom hole diameters