Loctek Premium Mount, 17"-34" Single Monitor Ergonomic Gas Spring Arm - VESA 75 & 100mm -- Capacity Min 9KG Max20KG - Tilt +90 -15deg - Best fit for Gaming Business Monitor - 5 Years Warranty

Even though it states supports 17 to 35 inch monitors on the product page the box I received stated 27 to 35 inch, when I emailed pb tech they confirmed it supports 17inch monitors. However my monitor weighs less than 9 kg (min weight) so the gas spring arm is stuck in the highest position even when adjusting the screw so is useless to me. I think you would struggle to find modern monitors that weigh more than 9kg's. Even though it states supports 17 to 35 inch monitors on the product page the box I received stated 27 to 35 inch, when I emailed pb tech they confirmed it supports 17inch monitors. However my monitor weighs less than 9 kg (min weight) so the gas spring arm is stuck in the highest position even when adjusting the screw so is useless to me. I think you would struggle to find modern monitors that weigh more than 9kg's.

Theres about 40cm's between the bottom of the monitor and desk, its height cannot be adjusted.
Unlike other stands where the desk mount and monitor mounts are separate parts for easy and safe placements, this is one unit, You have to attach the monitor BEFORE attaching it to the desk which makes for an awkward case of supporting a heavy monitor while turning the knob under the desk with your fingertips hoping the entire thing doesn't go ass up.
The top joint tilts the monitor, it can be tightened but even at its tightest, my 8.5kg monitor was heavy enough to tilt downwards. There's no way that joint will support 20kgs. Theres about 40cm's between the bottom of the monitor and desk, its height cannot be adjusted.
Unlike other stands where the desk mount and monitor mounts are separate parts for easy and safe placements, this is one unit, You have to attach the monitor BEFORE attaching it to the desk which makes for an awkward case of supporting a heavy monitor while turning the knob under the desk with your fingertips hoping the entire thing doesn't go ass up.
The top joint tilts the monitor, it can be tightened but even at its tightest, my 8.5kg monitor was heavy enough to tilt downwards. There's no way that joint will support 20kgs.