The Frigidaire Puresource Ultra Filter ULTRAWF is a genuine Frigidaire replacement water filter that fits Frigidaire Pure Source Ultra refrigerators which feature a cylindrical filter housing mounted on the refrigerator's ceiling. The Frigidaire ULTRAWF filter will also replace part numbers 242017800 and A0094E28261. This genuine Frigidaire refrigerator filter has been tested and certified to NSF / ANSI Standards 42 and 53 in Frigidaire Pure Source Ultra refrigerators for the reduction of the claims specified.