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Venturi masks are high-flow oxygen delivery devices. Once oxygen passes through the Venturi mask valve, the pressure automatically drops.
Venturi masks feature valves of different colors. Each valve requires a specific flow rate to provide the corresponding amount of oxygen. To change the concentration of oxygen, you must change the valve and the flow rate.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.