4.3 Inch Particulate Filter Compatible with 2091 P100, Installed on 6000 7000 FF-4 Filter Retainer Use, 4 Pack 2 Pairs (4pcs)

easy to install and a very good particulate filtration

I put these on my older mask when I 6503QL . This mask is for lawn mowing (my son), router MDF (myself), and rare dusty whatever.I love the interchangeability - all the related 3M fit on the same mount. So when I got the 6503QL I moved the organic filters to it and put these on the older mask. Perfect!The rating means it's for fine particulates including aereosols and oils. The numeric rating makes it close to or better than N95 and the Particulate makes it filter any aereosolized cruft from the largely thin masks being worn.I gave the other set to a friend for his international air travel for airplane and airport and mass transit use.

Have to take out of bag for a while to allow odor from manufactured material to go awayDoes make a difference when working with sanding, paint etc

These are Chinese made filters. I use them for wood working and for cleaning the fireplace. They get the job done, but I wouldn't trust them for anything more than sawdust and ash.

Still no covid-19 using on the job as an E.M.T so obviously they work very well with having covid positive pt's several shifts a week stillCovid-19 free as of 3-18-2021

Great dust mask. Can wear all day comfortably. Make sure you order filters as the mask does not come with them

Great product

These items are fake and I highly suggest anyone who reads this take notice. I am a healthcare professional and I wanted to believe these were real, but the smell after attaching these to the 3M half-face respirator was wrong; pungent, chemical smell and in my view unsafe.Just for reference, I have the “real” 3M round, pink P100 cartridges at work (which is why I wanted to buy more for home) and the real ones so no smell and are labeled 3M.Yes, I realize the non-brand won’t be labeled the same but the product I bought is very concerning and does not seem to be real, let alone safe to use with the odor which is clearly not a good sign.Disappointed. This product and those who make a profit should be ashamed of themselves for marketing during the time of pandemic.