Combination Cartridge/Filter NIOSH Rating Ammonia (AM) Chlorine (CL) Chlorine Dioxide (CD) Formaldehyde (FM) Hydrogen Chloride (HC) Hydrogen Fluoride (HF) Hydrogen Sulfide (HS) Methylamine (MA) Organic Vapor (OV) P100 Sulfur Dioxide (SD) Magenta Olive Compatible with Brand and Series MSA 1000 Series MSA 3000 Series MSA 4000 Series MSA Advantage 200 LS Series MSA Advantage 420 Series Respirator Cartridge Type Air Purifying Respirator Respirator Connection Type Bayonet