Everpure EV9324-21 Insurice Single PF i2000 2 System Featuring a new and improved Bowl design Reduces chlorine taste and odor and other offensive contaminants New and improved Micro-Pure II media inhibits the growth of bacteria 20-Inch prefilter reduces dirt and particles 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 NSF certified under NSF/ANSI Standards 42 and 53