Dustproof mask No.2091 filtering material 3 M (3 m) 6 set pieces.
Use with 3M™ Respirators 5000 Series or 3M™ Cartridge 6000 Series with 3M™ Adapter 502, or 3M™ Half and Full Facepieces 6000, 7000 and FF-400 Series with bayonet filter holders. When properly fitted, use in a variety of applications including welding, brazing, torch cutting, metal pouring, soldering, and exposure to lead, asbestos, cadmium, arsenic, and MDA for concentrations up to 10 times the Permissible Exposure Limit (PEL) with half facepieces or 50 times PEL with full facepieces. Full facepieces must be quantitatively fit tested to claim assigned protection factor above 10 in negative pressure mode. Do not use in environments that are immediately dangerous to life or health (IDLH).
No.2091 filter material pass RL3 and, even in presence of oil mist environment
It is with confidence, you can use round filter-filter material.
Low air resistance for filtration material entirely from the air, breathing can be done very easily.