ResMed Ultra Mirage and Ultra Mirage II Nasal Interface Elbow Assembly. The elbow assembly can be used for both the Mirage and the Mirage II full face interfaces. The elbow features a quick release swivel and 360 degree elbow rotation for comfort and reliable performance. Quick Release Swivel. The elbow assembly is responsible for the swivel that ensures hassle free air tube detach/attach process that streamlines your sleep apnea therapy session. 360 Degree Elbow Rotation. The elbow's ability to move 360 degrees ensures the tubing remains flexible and that it is able to adapt to your sleeping posture without difficulty. Key Features. Quick Release Swivel. 360 Degree Elbow Rotation. Reviewers Tip. You can quickly release the elbow from the interface. Acclimating to Full Face Interfaces. FAQ. What does the elbow assembly include. It includes the elbow clip, vent cover, elbow and swivel. Compatibility. ResMed Ultra Mirage Full Face Cushion Clip. ResMed Ultra Mirage Full Face Interface Replacement Cushion. ResMed Ultra Mirage Full Face Interface Replacement Cushion. ResMed Forehead Pad for Ultra Mirage II, Mirage Activa and Mirage Activa LT, Mirage SoftGel, Mirage Micro Nasal Interfaces, Mirage Quattro and Ultra Mirage Full Face Interfaces.