This is a wall plate-mounted, keystone box for 3 keystones in a vertical position. I originally wanted to use these wall plates, but unfortunately the cable box behind the wall plate isn't deep enough to handle the keystones + rj45 connector + cable bend, so I had to make my own.
The final result sticks out from the wall about 3cm (1.2 inches). There are 3 prints to make, and all you need to install are regular wall plate screws. The other two pieces slide into place.
I printed these on a Prusa MK4 in both PLA and PETG with no supports.
The author marked this model as their own original creation.