2 of Fette Filter Refrigerator Air Filters harmonious with Part # PAULTRA Air Filter. the benefits of an odor complimentary refrigerator with the Part # PAULTRA harmonious air filtration system. This is NOT a Frigidaire ® PureAir ® Ultra ® OEM. The Frigidaire ® brand names and logos are the registered of their several owners. Any use of the Frigidaire ® brand name or model designation for this product is solely for purposes of demonstrating compatibility.