Planar Triple Monitor Stand

The monitors are not height adjustable (independently of each other) and the side monitors are held in place on an opening that allows about a quarter of an inch of vertical slop. This means that it is almost impossible to get the monitors at the same vertical height. The center column is much smaller than the tightening arm opening, so a plastic sleeve is provided to secure the arm. This can cause the arm to get stuck on the sleeve if you attempt to adjust the arm height at a later date (which happened to me).

If you have way too much spare time and another person to help you, it should be possible to get all three monitors aligned correctly. I don't consider that acceptable, however.