We have a Shark UV850 which we bought from Costco. The Shark manual states that this requires an XFFK320 filter kit and a Hepa XHF320 filter. This product claims these numbers, but they are not the same size. The filter set is a bit big. However, you can do this by cutting the fabric filter to size and simply sliding it into the housing. As another reviewer noted, the HEPA filter doesn't stay on because the latch doesn't protrude far enough. It just shows up. You can force it to stay indoors by inserting a small 0.2 inch thick piece of wood between the latch and the filter frame after installation. It doesn't appear to be as well made as the filter that comes with the vacuum cleaner, but hopefully it will be the same. functional.
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