Pleatco for Mytilus B 100 GPM MA-100/160, Mytlus FMY 100, Mytilus 100 GPM MY 100, Mitra 100 GPM MA-100-160, Wet Institute Modufilter M-330 Replacement cartridge for mytilus and mitra modeld b 100 GPM ma-100/160, FMY 100, 100 GPM my 100, 100 GPM ma-100-160 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-7699 and filbur FC-1950; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algae Measures 7-7/8-inches in diameter by 22-1/8-inches in length and 3-1/16-inches of top and bottom hole diameters