This is a Shark Rotator Professional NV450 Replacement Filter Kit, for the Shark Rotator Professional NV450 Bagless Upright Vacuum Cleaners, Genuine Shark OEM Washable Foam and Felt Filter Kit, Part XFF450. This filter kit includes both the washable white Foam Filter (thick layer filter) and White Felt Filter (thin layer filter) for the Shark Rotator Professional Bagless Upright Vacuum Cleaner Models NV450. Shark gives a generous 6 Year Warranty With Your Rotator Professional Upright, and to ensure you keep this warranty in effect, it's important to ONLY use OEM Shark Euro-Pro filters during your warranty period. Each filter may be washed and reused, however it's VERY IMPORTANT to ensure both filters are completely air dried before installing and using the vacuum again. Many people like to have two sets of filters on hand, and extra back up set which is already clean and dry, ready to to use while the other set is cleaned. EuroPro Shark Part Number XFF450 for NV450 Shark Rotator Professional Upright Vacuum cleaners, includes 1 Felt Triangular Shaped filter, and 1 Foam (thick) Triangle Shaped Filter per order.