Filtration begins with water traveling through a porous shell with openings no greater than 5 microns in diameter. Filtered water then passes through a bed of KDF and GAC (Granulated Activated Carbon) for further filtration and bacteria control. Contains premium carbon with a high microporosity level for absorbing harmful VOCs (Volatile Organic Compounds). Designed as a premium replacement cartridge for Camco's Evo Water Filter housing. Not for sale in Canada.