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. It is constructed of flame-retardant polypropylene thermoplastic that can be painted over to match the environment. It features a manual damper which can be open or closed easily by detaching the face cover. Includes all mounting screws and hardware to easily mount the grille onto a wall or cabinet. Does not include duct clamps.