However the plan to help us during the installation is a bit complicated, not insurmountable but it requires a minimum of attention because this plan in question talks about the installation of 3 different media so make good attention look in the right place. Further description on Amazon.com says it is compatible for screens up to 42 ", out this support is compatible for screens up to 50" (see description on the Vogel's official website).
Note also that all necessary hardware for mounting in a wall of brick / stone is provided.
In short, I am satisfied and I do not regret my purchase.