A ventilation grid that was used on boats back in the 70s and 80s. The ship yard Albin used them on a lot of models. The plastic is getting brittle and they are hard / difficult to fins new so I made my own version.
The two parts are printed separately and glued with epoxy glue.
I've printed in both PETG and PLA. Surprisingly also PLA holds up really well.
The author marked this model as their own original creation.