Everpure EV9618-02 OCS 2 Filter Cartridge Bacteriostatic Cyst Reduction Scale reduction Lasts for up to 1,500 Gallons Made in the USA New and improved Micro-Pure II media with AgION antimicrobial protection inhibits any potential bacterial growth Everpure's unique filter blend using activated carbon reduces chlorine taste and odor and other offensive contaminants Saves energy by reducing scale build-up. Proportioned scale inhibitor feed dramatically prevents limescale from forming in brewing equipment Precoat submicron technology reduces dirt and particles as small as 1/2 micron in size Sanitary cartridge replacement is simple, quick and clean. Internal filter parts are never exposed to handling or contamination