Fancy clip to connect a snorkel to your mask strap.
Inside curvature is for a 25mm diameter snorkel (Aqualung in my case). Clip inside width and length are 4x30mm.
Be sure to print it laying on its side (see picture); this gives the highest strength for the 'hook' part.
My "Snorkelclip Simple" design is probably more robust and requires less supports (waste). It does require some zipties though...
Standard PLA settings, increase number of wall layers (3 to 5) to make it robust.