The protective sheet comes into use there., Where pushbutton 1-fold (265641), pushbutton 2-fold (265642) or room controller (265640) should be mounted on the glass walls and where they should be covered at the rear. The cover film is self.adhesive. Info: the price and article no. refer to 1 items adhesive film. Separate items cannot be supplied! Thus, order at least the minimum Std. pack (10 items) or many of them!