I bought it anyway because it was very cheap and the screen is almost 18 lbs.
But I have a problem with the head of the articulated arm : it is not compatible with the screws holes on the screen.
Look at this picture :
The head of the arm is too small.
Look at the next picture, the head of my older fixed support is much larger than the head of my new articulated arm :
Can I buy an adapter for the head?
Thanks for your help.