Flaps are hanging on hinges made from “raw” filament.
Designed for a 120mm fan. Parametric FreeCad source included if you'd like to remake it for a different size fan.
Also included files for TPU washers.
Video: https://github.com/gabr42/3D/blob/master/Prusa/box/fan%20cover/fan-cover-in-action.mp4?raw=true
The author marked this model as their own original creation.