The Replacement Nasal Cushion for the ResMed AirFit N30 CPAP Mask is available in three color-coded sizes: small (red)(64213), small wide (purple)(64215), and medium (blue)(64210).
Latex-free and designed to help minimize leaks, the ResMed AirFit N30 CPAP Mask Nasal Cushion is only compatible with the AirFit N30; it is not compatible with any other mask.