This oxygen humidifier bottle made of durable ABS material. It can withstand a large flow of 6LPM to ensure safe use. The large capacity of 350ml is matched with double water level scales to reduce the frequency of water addition and facilitate observation of water level Question 1: How high a flow rate can this oxygen humidifier bottle withstand? ? Answer: It can withstand a maximum flow of 6 LPM, which can meet the flow required for daily need. Question 2: How long is the hose of this oxygen humidifier bottle? ?? Answer: The adapter hose is 12 inches long. Product specifications: Material: ABS material Color: transparent Package includes: 2 Pack oxygen humidifier bottles Capacity: 350 ml/per Adapter tube length: 12" Flow rate: 6 LPM Note?Please tighten the humidifier bottle in the correct way to prevent leakage