8" X 8" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] 6" Diameter + Product Details Size –

+ Product Details Size – 16"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 20 5/8" height

+ Product Details Size - 36"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 16"h is the size for the duct opening measurement only

8" X 8" [Duct Opening] 4-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 9.75"H] 6" Diameter + Product Details Size –+ Product Details Size 8"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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 Location