I have a Shark WandVac 200 and was hoping to replace the filter with it. The filters looked perfect when I opened the box and I was glad to use them as genuine Shark replacements cost a crazy $16 each. When I tried to install one it snapped into place but wasn't tight enough to seal. It will rock back and forth in place. If you put the old filter and the new filter together, you can see that the new filter is slightly smaller in diameter than the original one. Using a filter would allow air and dust to bypass it. I'm sending them back and will look for another one to buy and try.