These replacement nasal prongs/pillows will fit all NasalAire II CPAP Masks. There are six sizes available. All sizes will fit all NasalAire II masks.
Sizing Information: Please note that while these prongs will fit all (original) NasalAire mask systems they are the updated design which was launched with the NasalAire II. They may fit differently than original NasalAire mask prongs. These prongs will not fit the NasalAire II Petite mask.