Pleatco PSD125-2000-M Replacement Cartridge for Sundance Double End 120 (MICROBAN), 1 Cartridge Replacement cartridge for sundance double end 120 model 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-8326 and filbur FC-2780 ; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 8-1/2-inches in diameter by 19-inches in length and 2-3/16-inches of top and 2-3/4-inches of bottom hole diameter