This Oxygen Humidifier consists of Brass Chrome Plated Inlet and Outlet. Oxygen Humidifier provides maximum humidity to oxygen, while doing so it uses the process called bubble-type humidification. It also consists of 3-psi safety valve. A hose barb of 6mm ID plastic tube is fitted to the outlet. The minimum and maximum water levels can be easily identified. 100 ml is the maximum water level that can be identified in the Humidifier.