<p>Shark Navigator NV42 Deluxe Foam & Felt Filter Kit Part # XFF36 fits Navigator Upright models UV402 & NV42. Compare to Part # XFF36.</p> <p>This kit includes 2 washable pre foam filters and 1 post motor filter.</p> <p>It is highly recommended that you change your filters every 3 to 6 months for optimal performance of your Shark vacuum.</p> <p>Absolutely Essential for Allergy Sufferers!</p> <p>This is not a Shark OEM product and is not covered under any Shark manufacturer's warranty. The Shark brand names and logos are the registered trademarks of their respective owners. Any use of the Shark brand name or model designation for this product is made solely for purposes of demonstrating compatibility.</p>