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Adjustable Venturi MaskFeatures: Provide various choices to suit the individual patients' requirements, 24% (blue), 28% (yellow), 31% (white), 35% (green), 40 %(pink), 50% (orange), 60% (red) single venturi valve is available with fixed concentration. The standard length of tube is 2.1m, and different length is available. Size: S, M, L, XL ![]()
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