10"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 27.75"h] Width_20in Superior Airflow Control: Built-in damper 4 X 12 Is CRFG2028 Width_14in

Superior Airflow Control: Built-in damper lets you control how much air enters your room

+ Product Details Size - 12"w X 10"h is the size for the duct opening measurement only

Smooth Powder Coat Finish: The grill boasts a sleek and smooth powder coat finish that not only adds a touch of elegance to your surroundings but also enhances its resistance against wear and tear

+ Product Details Size – 8" x 18" or 18" x 8" is the size for the duct opening measurement only

+ Product Details Size – 36"w X 12"h is the size for the duct opening measurement only

10"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 11.75"w x 27.75"h] Width_20in Superior Airflow Control: Built in damper 4 X 12 Is CRFG2028 Width_14in Superior Airflow Control: Built in damper lets you control how much air enters your room + Product Details Size 12"w X 10"h is the size for the duct opening measurement only