1.Air breathing apparatus fire safety. 2.3L, 6.8L, 9L are available 3.Demand valve: airflow exceeds 505l/min This Self-contained Positive Compressed Air Breathing Apparatus is widely used in the fields, such as fire fighting, chemical industry, shipping, petroleum, mine, laboratory, etc. It can provide effective respiratory protection from toxic gases for firemen, emergency rescuer.It is comply ...