10" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] White and durable finish that resists

and durable finish that resists scratches and maintains a clean

+ Product Details Size - 26"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 8 5/8" height

positioning supply and return grills accordingly

+ Product Details Size - 28"w X 4"h is the size for the duct opening measurement only

10" X 10" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] White and durable finish that resists+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 11. 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