Usage Tips:1. High-quality materials: Our 6PCS Tube Adapter CPAP Accessories For Z1 Z2 Travel CPAP Machine are made with durable and premium materials, ensuring long-lasting use and reliable performance. 2. Seamless compatibility: Designed specifically for Z1 Z2 Travel CPAP Machine, our tube adapter seamlessly connects your machine to the necessary accessories, allowing for a smooth and efficient airflow during sleep therapy. 3. Enhanced convenience: With these CPAP accessories, you can easily connect and disconnect your tubing without any hassle. The user-friendly design makes it convenient to set up and adjust your CPAP equipment, providing a comfortable and hassle-free experience. 4. Improved portability: The compact and lightweight design of our tube adapter allows for easy transportation and storage. Whether you're traveling or simply moving your CPAP machine from room to room, these accessories ensure that your device remains portable and ready for use. 5. It allows you to connect the hose into the port on the end of the CPAP Machines. This tubing adapter will work with all universal tubes that have a 22mm rubber cuffed end,Outer diameter on both ends: 20mm/14mm. Colour:Transparent Material:plastic Package Contents: 6 * Tube Adapter CPAP Accessories 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.