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organic steam,Chlorine,Hydrogen chloride,carbon dioxide ,hydrogen fluoride,hydrogen sulfide,Ammonia,methylamine ,formaldehyde Material Activated carbon, electrostatic filter cotton Usage Use with double-tank respirator mask, not alone. Function Effectively filter more than 99.97% of all kinds of particulate matter,Effective filtering organic steam, Chlorine,Hydrogen chloride,carbon dioxide ,hydrogen fluoride,hydrogen sulfide,Ammonia,methylamine ,formaldehyde Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.






