A while ago the filter for my Black & Decker HNV215B mysteriously disappeared. After reading less than satisfactory reviews of third-party replacement filters, I finally found this list. The filter fits perfectly (see photo) and perfectly protects the fan from dirt. My very first job was to pick up the baking soda with a vacuum and little to no dust came out of the back of the vacuum, suggesting the filter was preventing it from getting into the fan and inside of the vacuum. When I emptied it, I fully expected the soda to go somewhere when I removed the nozzle, but the filter kept it all in! The fit is snug as it should be and easy to clean. Definitely worth the money.