This feather duster is a good idea but poorly executed. The designers of this device for some reason chose not to include latches that would hold it securely in the probe tube or any part of the handheld vacuum. While it technically 'fits' in the sense that the connecting tube diameter is just the right size (albeit a bit small) to fit the Shark vacuum tube, the fit is loose and the whole thing spins freely in the tube . The only way to use it is to hold the duster yourself so it doesn't spin and fall out of the vacuum tube. I suppose it could have been secured with tape while in use, but that's a poor way to solve a problem that shouldn't have existed in the first place. If it cost more I would send it back but it's not worth it to me. I cannot recommend this product; Unfortunately, they all look pretty much the same, so I don't know if there are better ones.
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