Pleatco Replacement Cartridge for Hayward Star-Clear Plus Star-Clear Plus C-900, Sta-Rite PXC-95 (MICROBAN) 1 Cartridge Replacement cartridge for Hayward star-clear plus, star-clear plus c-900 and sta-rite pxc-95 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-8409 and filbur FC-1292 ; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 8-15/16-inches in diameter by 17-3/8-inches in length and 4-inches of top and bottom hole diameters