Bumblebee Hive Ventilation

I made lot of models with 3D printer during last 4 years.
Some of them were exposed on my stall at Maker Faire Prague 2021.
Now I would like to offer some of them for other 3D printing guys.

There is the third part for bumblebee hive make. This one is used for regulated ventilation. It can be printer on Prusa MK2.5S with layer 0,35 or 0,2 mm.