It's a small grid to protect the water outlet of faucets, preventing small animals from entering and getting trapped, and clogging them.

Depending on the faucet used, you might need to resize the grid because your faucet has a different diameter.

It was made in PLA, but I believe it can also be made in PETG, TPU, and ABS.

If it's loose, you can use electrical tape or masking tape on the faucet's rim to make the grid more secure.