Particulate Filter is approved 99.97 percent effective against certain oil-based & nonoil-based particles. Lightweight, easy to breathe through. Use with the 502 Filter Adapter (sold separately) when used in combination with a 3M Cartridge. Use with 3M Respirators 5000 Series or Cartridge 6000 Series with 3M Adapter 502, 3M Facepieces 6000 Series, or 3M Facepieces 7000 Series. When properly fitted, can be used in a variety of applications including welding, brazing, torch cutting, metal pouring, soldering & exposure to lead, asbestos, cadmium, arsenic & 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 filter in environments that are immediately dangerous to life or health (IDLH).