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] w30h30 + Product Details Size -

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 18"h is the size for the duct opening measurement only

+ Product Details Size – 34"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 16" or 16" x 6" 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] w30h30 + Product Details Size -+ 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