12" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Aluminum Adjustable Curved Blade + Product Details Size -

+ Product Details Size - 25"w X 16"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are 13" Width X 13" Height

[Outer Dimensions: 10

12" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] Aluminum Adjustable Curved Blade + Product Details Size -+ Product Details Size 12"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 13. 75" height. High Quality High quality steel with counter sunk screw holes (screws included) and no sharp edges. Equipped with a lever for easy airflow adjustment and dampening. Airflow Control Adjustable airflow lever allows precise control over the direction and volume of air. Installation