This filter provides workers with versatile protection, exceptional filter efficiency, durability, economy and simplicity. 3M's Advanced Electret Media provides a lightweight and easy breathing combination. This filter is designed for applications including welding, brazing, torch cutting, metal pouring and soldering, as well as protection against OSHA substance specific particle exposures such as lead, asbestos, cadmium, arsenic, and MDA. This filter is compatible with the 3M 6000 and 7000 Series Facepieces and can be adapted for the 3M 5000 Series respirators. Sold by the pair.  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).