With this bottom of the case you have the possibility to screw your Raspberry Pi 4 to a wall with M3 countersunk screws. I‘ve included the Pimoroni Fanshim top for RPI4 as that is what I‘m using on my enclosure.
The case bottom is compatible with any of the tops from Malolo‘s screw-less / snap fit Raspberry Pi 4 B Case & Stands:
https://www.prusaprinters.org/prints/4074-malolos-screw-less-snap-fit-raspberry-pi-4-model-b
You can find my RPI3 version here; https://www.prusaprinters.org/prints/147498-raspberry-pi-rpi3-wall-mount
The author remixed this model.