The Carlisle Brass Hit & Miss Ventilator Grille Polished Brass can be used in a number of areas including bathrooms, kitchens and living rooms. The vent can be opened or closed using the central button, by a sliding action. Two rivets either side of the central slide knob, guide the vent when opening and closing. Solid Brass Grille This ventilator grille is made from solid brass and has a polished and lacquered brass finish. Other Variations  The grille is also available in a polished chrome finish and the following size variations: 165mm x 89mm 242mm x 242mm 242mm ...