14 in 1 protective mask, reusable respiratory protection mask, gas mask, filter, protection against gas vapor, dust mask, suitable for grinding, polishing, a

This mask is a dual-interface, dual-use model. It can be connected to both sides of the poison filter box. It can be connected to the central cartridge. It can be connected to the airway tube! What the filter box protects Box #3: Organic gases and vapor, benzene, ketone, carbon disulfide, etc. Box #4: Ammonia, hydrogen sulfide, etc. Box #7: Acid gases in steam, sulfur dioxide, chlorine, hydrogen sulfide, nitrogen oxides, etc. Instructions for use:1. Hold the end of the strap with both hands and pull it so that the mask can completely cover the nose and mouth area. Connect the clip to the back of the neck to seal the mask with the face.2. Pull the end of the strap again to tighten it further.3. Before use, inspect the mask to determine if it is properly sealed.4.During use, if the user smells any odor or the inhalation resistance increases, the life of the filter box has expired. Please replace the filter box or filter cotton immediately.