The 10 x 2.5 Inch 10 Stage Countertop or Undersink Filter Cartridge Replacement by Tier1 provides great tasting water while reducing a wide variety of major water contaminants. The ten-stage filter effectively traps and reduces heavy metals in the first several stages, then treats for organic contaminants and odor-causing agents, and finally ends by reducing further bacteria and viruses such as cysts and protozoa. Within the filter is also ion exchange resin which expands as water runs through the system (void space near the center is necessary for this expansion), to help serve as an extra layer of defense against heavy metals like lead. This filter is compatible with all standard 10 by 2.5-inch housings and has a filter life of 1,500 gallons or 2 months, whichever comes first. Enjoy the peace of mind that accompanies great filtration and order your 10 x 2.5 Inch 10 Stage Countertop or Undersink Filter Cartridge Replacement by Tier1 today!