The product can be transparent green and transparent white.
The star lumen tubing can ensure oxygen flow even if the tube is kinked, different length of the tubing is available.
Integral design, which is able to adjust to deliver oxygen concentration of 24%, 26%, 28%, and 31% in 3 liters per minute and 35%, 40%, and 50% in 6 liters per minute without assembling of accessory parts for flow-rate/oxygen concentration adjustment.
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