I use this alternately with the OEM single filter that comes with my Ryobi P7131 One+ Li-Ion 18V cordless handheld dry vacuum with crevice tool. I have two of these vacuums and change the filters regularly. I would highly recommend these filters for their quality and value. ***** Advantages *****+ PERFECT FIT - equal or better than OEM filters+ Great value compared to OEM filters+ Replacement filters come with a cleaning brush to clean the filter slots + Excellent quality + Good cleaning *** ** Disadvantages *****- ?