The ResMed AirFit N20 Cushion Replacement is a replacement nasal CPAP mask cushion for the AirFit N20 Nasal System and AirFit N20 for Her. The replacement cushion is available in small, medium, and large. Choose desired size when ordering. This cushion is for the N20 mask series only. It is not compatible with any other mask. This is the cushion only and does not include any other items.