Pleatco PMA40-F2M-M Replacement Cartridge for Master Spa Legacy / Freedom (MICROBAN) Cartridge, 1 Cartridge Replacement filter for pool and spa cleaning systems; microban inhibits the growth of stain and odor causing microbes like bacteria and algea 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 ; Microban inhibits the growth of stain and odor causing microbes like bacteria and algea 7-3/16-by-2-inches MPT with handle; made in USA