This 2 Pack Refrigerator Water Filter is used in Amana® refrigerators with filter access inside the refrigerator. Simply turn the Refrigerator Water Filter to remove and replace. While retaining beneficial fluoride, this NSF® Certified Refrigerator Water Filter reduces cysts, chlorine taste and odor, particulates (class I), and lead. The contaminants or other substances removed or reduced by this water filter are not necessarily in all users' water. Replacing this Refrigerator Water Filter every 6 months ensures clean, safe drinking water.