Pleatco PJ80-M4 Replacement Cartridge for Sherlock 80, 1 Cartridge Replacement cartridge for sherlock 80 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-9480 and filbur FC-1400; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 10-inches in diameter by 14-9/16-inches in length and 6-inches of bottom hole diameter