Original design by @simple3D.

This is a Bambu centric remix - each of the 4 parts set on a a separate plate and setting the required slicer settings for the screen parts (no top layers, no bottom layers, 40% infill, honeycomb; supports enabled).

Requires six M5x25 bolts and six M5 nuts to attach the halves together.

Design by @simple3D and I recommend you check out his howto:

RAM Promaster Window Screens by Simple3D | Download free STL model | Printables.com