These are two piece curtain hooks that will work with most standard shower curtains. The hook and chip attach with a small hole in the back.
No glue or hardware is required.
No special print settings required. I printed mine using a Prusa MK3S with default 0.2 mm layers. If you print the hook and chip together, you can turn on the sequential print setting to minimize stringing.
The author hasn't provided the model origin yet.