20 inch 6 stage filter composed of 2, 1 micron filters, KDF55, KDF85, ion exchange resin and GAC. Filter treats 120,000 gallons of water or 480,000 liters. Replacement filter for whole house applications. Removes hundreds of different contaminates from your drinking water. Replacement filter for various housing and water treatment systems manufacturers. removes lead, chlorine, pesticides and other contaminates better than simple granular activated carbon by incorporating several filter material in particular KDF55, KDF85 and granular activated carbon. This trio of filter materials provide outstanding efficiency and extended filter life. the ion exchange provide additional water softening ability. This filter provide outstanding water treatment capacity at a very low price. Provides quality traeted water for pennies a gallon.