Certification : CEDenfense Objects : Organic Gas,Acid Gas,Ammonia,HydrogenUsage : WORKWelcome to our store!0.5M, 1M, 5M, 10M 40MM interface gas mask snorkel Wear resistant Anti-aging Gas mask and filter Connecting pipeFeatures:The product has excellent wear resistance and aging resistance. The catheter can be firmly combined with the universal 40mm screw interface, with good soft sealing and good tubular strength.Product use:The air guiding tube is flexible and corrugated. It is suitable for all kinds of gas mask connection filters and gas passages. It can pass through the trough type, tank body and warehouse type, and is suitable for long-distance anti-virus operation protection.