Pleatco PPM50SC-F2M-M Replacement Cartridge for Pacific Marquis Spas, 1 Cartridge Replacement cartridge for pacific marquis spas 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 5CH-502 and filbur FC-0196M; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 5-1/4-inches in diameter by 12-3/16-inches in length and 2-inches in bottom hole diameter