Pleatco PCC130-M Replacement Cartridge for Pentair Clean and Clear Plus 520 (MICROBAN), 1 Cartridge Replacement cartridge for Pentair clean and clear plus 520 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-7472 and filbur FC-1978; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 7-inches in diameter by 32-inches in length and 3-inches of top and bottom hole diameters