This duct grille was designed to be wall mounted and connected to ducting to act as an air intake or exhaust in various ventilation, circulation, and heating/cooling transfer applications. The grille is constructed of heavy-duty steel, painted with matte-white powder coat finish. Features a round collar on the backside to attach ducting. Includes all mounting screws and hardware to easily mount the grille onto a wall or cabinet. Does not include duct clamps.