The Whisper Swivel removes waste gas from the circuit and hose of the Profile Lite CPAP mask. This item is only compatible with the Profile Lite Silicone Contour, Gold Seal, and other old Profile Lite designs that do not come with a swivel. It is not compatible with other masks.
The Whisper Swivel Exhalation Port is only for old Profile Lite CPAP masks. The Profile Lite is one of RespShop's most popular masks, and if you have one of the old masks without a swivel, this exhalation port is ideal for helping remove excess gas from your mask.
The Whisper Swivel II should not be used on any other mask: it is only compatible with the Profile Lite.
Why is this not compatible with the ComfortGel Blue?
The attachment ports are designed to connect with the Profile Lite specifically.