Pleatco PAP50-M4 Replacement Cartridge for Predator 50 - Pentair Clean and Clear 50 (MICROBAN), 1 Cartridge Replacement cartridge for predator 50 and Pentair clean and clear 50 models 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-9405 and filbur FC-0684; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 10-1/16-inches in diameter by 8-5/8-inches in length and 6-inches of top and bottom hole diameters