3M™ 051138-21565 5101 5000 Disposable Half Facepiece Respirator Assembly, S, Resists: Acid Gas, Chlorine, Hydrogen Chloride, Hydrogen Fluoride, Hydrogen Sulfide, Organic Vapors and Sulfur Dioxide 3M™ 051138-21565 5101 5000 Disposable Half Facepiece Respirator Assembly, S, Resists: Acid Gas, Chlorine, Hydrogen Chloride, Hydrogen Fluoride, Hydrogen Sulfide, Organic Vapors and Sulfur Dioxide