Comprehensive Set: the short tube and elbow for , for N20, and N40 masks. Enhanced Durability: Utilizing advanced materials, the construction of the short tubes has been fortified to withstand frequent use and maintenance. This upgrade not only extends the lifespan of the tubes but also maintains optimal performance throughout their use. User-Friendly Design: Engineered for convenience, these replacement parts maintain the intuitive design of the old components. This similarity allows for effortless installation and removal, enabling you to replace parts quickly without needing additional tools or extensive knowledge. Optimized for Comfort: The redesigned elbow enhances the mask's fit, significantly reducing the common issues of noise and air leakage. This improvement ensures a quieter and more comfortable experience, allowing for uninterrupted sleep and effective therapy. Color:Transparent White Material:plastic Package Contents: 1 * short tube and elbow 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.