Pleatco PFW60 Replacement Cartridge for Fox Wall-Pak-80, 1 Cartridge Replacement cartridge for fox wall 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-7463 and filbur FC-3112 ; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 7-7/8-inches in diameter 13-3/16-inches in length and 3-1/16-inches of bottom hole diameter