I ordered these 6 "nasal cushions" for my CPAP system. My insurance paid for them. They were delivered, I opened the package of one of them, pulled it out – and realized I'd ordered the wrong kind. The bottom photo below shows the one I opened, at the bottom of the picture, and the other 5, still sealed in their packages, at the top.
IF you use a ResMed brand CPAP machine and a model N30i mask, you may be able to use these babies!
For your reference, the upper photo below (from an ad on the web) shows what the whole N30i headset looks like. My offer does NOT include the whole headset – just 6 of the nasal cushions, the part I've circled in red.
The specs of these are: "ResMed Airfit N30i medium cushion". Make sure that all these specs fit your needs before you speak up for these little treasures.