The ResMed AirMini F20/F30 Setup Pack includes a special connector which replaces the elbow connector that comes standard on the AirFit and AirTouch F20 and F30 mask interface systems. This allows the F20 and F30 masks to attach to the ResMed AirMini tubing. If you already have the ResMed AirMini tubing, you can buy this connector and the F20 or F30 mask if needed and avoid having to buy an AirMini F20/F30 Setup Pack.