Compatibility Assurance: Specifically designed for Wisp Nasal Mask, this short tube features an outer diameter of 22mm and a length of 18.5 inches. It requires connection to a 22mm (inner diameter) hose prior to device attachment, ensuring a and optimal functionality. Convenient Quick Release: Equipped with user-friendly side buttons, this tube allows for a hassle-free disconnection, particularly useful during nighttime interruptions. Simply the buttons gently to detach the tube, facilitating a quick and easy process. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Color:As Shown Material:plastic Package Contents: 1 * Connecting Hose 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.