PVF110 is a filter for the new PHV1810 model of Black & Decker Pivot Vac 18V Cordless Pivoting Hand Vac.
These filters are slightly different from the previous popular model PHV1800 (which took PVF100).
The filters are easy to remove and they are washable. I typically remove one, wash it, and while it dries install another filter.
A friend of mine has PHV 1800 and I was hoping to buy the same model so we can share the filters my friend bought in bulk. However by the time I got around to buying the vacuum, 1800 was not available, and 1800 filters do not fit 1810 model. Not surprisingly, as B&D wants to sell more filters for the new model.
Be careful when you buy replacement filters, as there are still lots of filters for PHV 1800 on the market.
Note: there is a typo in the title of the product. Black&Decker does not have a model number PHV18180, it should have been PHV1810. I contacted the seller to let them know. [Updated - The title has been corrected.]