3MT 2000 Series Filters P100 Filters for use with 3MT Respirators 6000 and 7000 Series Facepieces w/Bayonet Attachments or as a Prefilter on 5000 Series Respirator and 6000 Series Cartridges.  P-Series filter intended for removal of any particle including oil-based liquid aerosols. 3M recommends that P-series filters should be used and reused for no more than 40 hours of use or 30 days, whichever occurs first, in atmospheres that contain only oil aerosols unless the filter needs to be changed for hygiene reasons, is damaged, or becomes difficult to breathe through before the time limit is reached.  Sold in packs of 2.