The EverPure PRO-4 delivers premium quality drinking water for bottleless coolers and drinking fountains. The Pro 4 combines membrane and carbon block technology for superior filtration results down to 0.15 microns. The Everpure MicroGuard Pro 4 features capillary membrane filtration which reduces 99.9999% of bacteria, asbestos fibers, and cysts such as cryptosporidium and giardia. The EV-9637-02 Pro-4 replacement cartridge features Submicron filtration which reduces dirt and particles and delivers taste, odor and chlorine reduction. The Everpure Microguard Pro 4 sanitary cartridge replacement is simple, quick and clean. Internal filter parts are never exposed to handling or contamination.