Pleatco PWWPC200-M Replacement for Waterway Proclean In-Ground Pool Cartridge 200-Square-Foot (MICROBAN), 1 Cartridge Waterway 200-square-foot proclean in-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-8420 and filbur FC-1211; 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 28-1/4-inches in length and 4-inches of top and bottom hole diameter