This mask is a dual-use dual-use model. It can be connected to both sides of the filter box. Objects of poison tank protection Tank 3: Organic gas and steam, benzene, ketone, carbon disulfide, etc. Tank # 4: Ammonia No. 7 tank: acid gas in steam, sulfur dioxide, chlorine, hydrogen sulfide, nitrogen oxides, etc. 1. Instructions for use: 1.Hold the end of the strap with both hands and pull it out so that the mask can completely cover the nose and mouth area, and connect the fasteners behind the neck to seal the mask with the face. 2.Pull the end of the strap again to tighten it further. 3.Before use, check the mask to determine if it is properly sealed. 4.During use, if the user smells an odor or the resistance to inhalation increases, the service life of the filter cartridge has expired, please replace the filter cartridge or filter cotton immediately. Special precautions for users 1.Please do not use this mask when the oxygen concentration is below 18%. 2.Please do not use in the following cases. Unknown hazardous substances Concentrations of harmful substances reach concentrations that immediately endanger life and health When you smell or taste a harmful substance. 3.Pre-use training should be performed by qualified persons before use. 4. When not in use, store the mask in a place away from pollutants and keep it sealed
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