Pressure reducing valve: The theme of the pressure reducing valve made of brass, high toughness, wear resistance, corrosion resistance, better sealing safety. Fine pressure gauge: the pressure gauge is made of high quality glass, thick and anti-fall design, clear scale and high sensitivity. filter: double protection, more energy efficient, more economical, to use; Precision machining is used to the machining accuracy of each part. After treatment, it is not easy to rust, long service life and durable, structure: high pressure decompression adopts type decompression structure, which has small volume and long service life; Made of high quality , which is strong and sturdy,Applicable to: family hospitals, energy saving, high strength and durability, small and convenient, both internal and external. Tide : Removable and washable, more hygienic. Built-in filter to prevent impurities from entering Product Name: Oxygen inhaler Thread: G 5/8 inch Colour:blue + transparent :Zinc Package Contents: 1 x Oxygen Pressure Regulator 1 x Nasal oxygen tube 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.