Pleatco PAS35-2M Replacement Cartridge for Artesian Top Load Spa (Coleman) (MICROBAN), 1 Cartridge Replacement cartridge for artesian top load spa 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 7CH-322 and filbur FC-0419 ; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 7-1/8-inches in diameter 7-9/16-inches in length and 2-inches of bottom hole diameter