The F20 Nasal Cushion is supplied with all AirFit F20 & AirFit F20 For Her Full Face CPAP Masks.
Replacement cushions are available in three sizes -- Small, Medium and Large.
All sizes can be used on any AirFit F20 or AirFit F20 For Her mask frame. Size on AirFit F20 Cushions is indicated by a large letter -- S, M or L -- printed on the base of the cushion.