Features: The return air grille's smooth surface is simple to wipe down and keep clean. The air supply diffuser helps maintain the comfort of your kitchen and house by providing sufficient airflow. Specifications: Material: steel Color: brown Size: outer dimension is about 11.9 x 13.8 inches Package includes: 4 x Air vent covers Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays