Feature 1Made of highquality PVC materials, strong and durable, nontoxic, safe and harmless to use. 2With clear scale of the oxygen flowmeter for high sensitivity and accurate measurement. 3Detachable design of humidification bottle, easy to clean and more hygienic. 4Including oxygen filter flow meter, connection pipe and nasal tubing for oxygen supply system, suitable for hospitals, home use, etc. 5Mainly used to humidify the dry oxygen and moisturize the oxygen, a great oxygen supply accessory.Item Type: Oxygen Filter Flow MeterMaterial: PVC .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xOxygen Filter Flow Meter1 x Connection Pipe1 x Nasal Tubing