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Nasal oxygen cannula - simple: 1.Made of clear,medical grade PVC. 2.Soft prong, Straight prong, Curved prong is available. 3.Color: green transparent, white transparent and light blue transparent. 4.Longer and thicker anti-crush tube fits tightly and is less likely to leak. 5.Length: with 2 m tubing, different length can be customized.
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