10"w X 6"h [Duct Opening] 3-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 7.75"H] 10" Diameter + Product Details Size -

+ Product Details Size - 18"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 12"h X 2"d (for duct opening measurement only)

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 20" duct openings

Actual Filter Size – 7 3/4"w x 31 3/4" x 1"

Do not measure the overall size of the register itself

10"w X 6"h [Duct Opening] 3-Way Horizontal Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 7.75"H] 10" Diameter + Product Details Size -+ Product Details Size 10"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 7. 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