From the manufacturer this water filter is used in Maytag and Jenn-Air refrigerator, 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, lead, mercury, and more. Replacement of this refrigerator water filter every 12 months, ensures safe drinking water. Quarter turn in the refrigerator cyst water filter Whirlpool, Maytag, Amana, Estate, Roper, Kitchen Aid, Jenn Air model independent bottom-freezer refrigerator.