Thank you for your responses.

Piece F is on there, it is that grey piece. As far as the actual unit, it is a Resmed Airsense 10.

The mask is an F&P Simplus.

Hi everyone, New poster here. I am having some difficulty with my mask/hose connection. I have a new hose, and it seems like it fits very, very tight onto the mask. I have attached a picture. This is with me shoving it on with a fair amount of force. I’m not exactly sure how to describe it, but typ...