Pleatco PRB35-IN-M Replacement Cartridge for Dynamic Series IV - DFM, DFML, Waterway 35, In-Line (MICROBAN), 1 Cartridge Replacement cartridge for dynamic series iv - dfm, dfml, waterway 35, in-line 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-4335 and filbur fc-2385; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 5-inches in diameter by 9-1/4-inches in length and 2-1/8 inches in top hole and 2-1/8-inches in bottom hole diameter