Philips Respironics Whisper Swivel II Exhalation Valves
Philips Respironics CPAP Mask Whisper Swivel II Exhalation Valves - Non OEM
This is a replacement exhalation port for Respironics masks, and should only be used with reusable Silicone Contour Masks, Gold Seal Masks, and some older ProfileLite Masks.