This is a printable bathtub drain hair catcher. Great for preventing clogs caused by long hair getting caught in drain.
The stem of the "mushroom" should hang inside the drain, with the vanes under the top resting on the chrome edge of the drain hole to prevent the stem from cracking if it is stepped on.
I've designed, made and tested two prior versions, but this one seems to get the drainage/flow rate right for a water-saving shower head.
Formlabs Durable Resin
I've printed this on a Form 2 with durable resin. Some supports can be tricky to remove, so minimize the number inside the stem of the mushroom if possible.
Haven't tried FDM printing yet - may run into strength problems with stem, but should be printable with PVA.