This Connector is only used for the Philips Respironics DreamWisp Nasal CPAP Mask.  The Connector is used to attach the top side sections of the frame at the top of the head and will also increase or decrease the length of the frame.  Although 90% of cpap users will find the medium size connector the best fit, sizes small and large are also available.  If the mask frame falls backward and is too close to your ears, you may need a smaller size connector.  If the frame falls forward on the head and is too close to your eyes, you may need a larger size connector.The nasal cushion for the DreamWisp Nasal CPAP Mask is engineered to help minimize leaks while providing a wide-open field of vision, allowing you to see and do more before falling asleep. This product is a replacement for the original cushion that comes with the DreamWisp Nasal CPAP Mask and is available in a selected size.