FeatherRide Replacement Swivel Elbow Connector for Airfit F20 F30

[Replace It Every 3 Months] The connectors are made of high quality materials, which are durable and save the trouble of replacing it every week. It is recommended to replace it every 3 months.
[Reduce Noise] When in use, it can help diffuse air more gently with vent, so you can enjoy a quiet night.
[Avoid leakage] It keeps perfectly seal during use, so you could get the stable flow of fluids and full airflow easily, giving you a comfortable and quiet experience.
[Special Design] Swiveling design, to increase flexibility and prevent knotting when you turn over at midnight.