This is a VESA-compatible wall mount support monitors of most weights and sizes.

Can be used for portrait mode i
Tilt about +- 5 degrees
Angle +- 40 degrees
safe loading: 20lb

I used PLA in testing but I would recommend using ABS or PETG especially if the ambient temperature in your environment is above 25C. This is highly important because PLA will creep and deform over time if the room temperature is too warm or the load is too high.

but PLA has been doing fine for like 2 years now

print settings

15-18 % gyroid infill
4 Walls
0.15 layer height
Support not needed
 

Parts list:
4 ¼ in screw 3 in length
¼ in screw 3.5 in length
5/16 in tapered screw 1.5 in
20 ¼ in washers
2 5/16 washers (one 1.5in diameter and one regular)
½ in threaded rod 14 in
2 ½ nylon locknuts
5 ¼ in nylon lock nuts
2 ½ in washers

1 kg roll of filament
4 days of print time