1. It has multi-type specifications and is used in various frequency oxygen systems;2. The circulation performance is excellent, and it can pass the flow of copper and radon pipes with the same inner diameter and capacity;3. It is convenient and quick to unplug and plug in the pipe cover, and the quick connection part of the remaining pipe is safe, reliable and durable;4. The screw part has a sealing section, and the M5 metric thread has a complete seal to prevent leakage in the screw rubber quick-connect part;5. Nickel can prevent corrosion, contact and pollution, so it is more durable when used directly.