Features: 2 Way air supply grille: The left and right wind direction of the air vent covers is fixed, and there is a manual adjustment button on one side, which can be adjusted up and down to control the wind direction and improve air circulation Easy installation: There is a hole on the left and right sides of the vent covers, just use two screws to line and tighten to complete the installation Specifications: Material: metal Color: white Dimensions: 12"W x 4"H Package includes: 12 x Air vent cover Note: Manual measurement, there may be slight errors in size. Colors may vary slightly due to different screen displays.