10"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] Compatible with Duct 6" + Product Details Size -

+ Product Details Size - 22"w X 4"h is the size for the duct opening measurement only

Actual Filter Size – 9 3/4"w x 25 3/4" x 1"

+ Product Details Size - 30"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 5 3/4" x 1"

+ Product Details Size – 32"w X 24"h is the size for the duct opening measurement only

10"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] Compatible with Duct 6" + Product Details Size -+ Product Details Size 10"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 9. 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