This is a simple adapter I made to connect the hose connector for my ResMed AirFit P30i CPAP mask to one of those cheap ozone cleaners you find on eBay (e.g. https://www.ebay.com.au/itm/154431321036). This should theoretically fit any of the masks from the same range (AirFit F30i, N30i, P30i)
The author marked this model as their own original creation.