VDK protection grilles have a nice finish, in anodized aluminium, and are used for covering the Vantage smoke dampers ( with 1 or 2 doors).

The central core of the grille can be taken out with the use of 2 springs installed on the button of the grille`s frame. The advantage of this fact is the quick access to the smoke damper without the need of  dismantling the grille installation from the wall or from the ventilation shaft.