20 inch 6 stage filter composed of 2, 1 micron filters, KDF55, KDF85, ion exchange resin and GAC. Filter treats 80,000 gallons of water or 320,000 liters. Replacement filter for whole house systems, various filter housing and system manufacturers. Removes hundreds of different contaminates from your drinking water.Removes chlorine, lead, pesticides, VOC's and taste using the more efficient combination of granular activate carbon, KDF55 and KDF85 filter materials.