Pleatco PXST200-M Replacement Cartridge for Hayward X-Stream 200 Cartridge (MICROBAN), 1 Cartridge Replacement cartridge for Hayward x-stream 200 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-8419 and filbur FC-1288 ; 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 29-5/16-inches in length and 4-inches of top and bottom hole diameters