3MR8233 / 8233 RESPIRATOR PARTICULATE DUST/MIST 3M™ Particulate Respirator 8233, N100 Ideal for exposures to OSHA substance specific particulates in non-oil environments: lead, cadmium, arsenic, and 4,4'-Methylenedianiline (MDA). Use for solids such as those from processing minerals, coal, iron ore, flour non-oil based mists, and metal fumes from welding, brazing, and other processes involving the heating of metals. Features the 3M™ Cool Flow™ Exhalation Valve for cool dry comfort, with advanced electret media, faceseal and adjustable straps. Made in USA. NIOSH 42CFR84 approved. Sold individually.