8" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] sidewall Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 27 3/4" x 1"

and smooth surface

actual front end outer dimensions are approximately 12 5/8" width X 34 5/8" height

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 14" OR 14" x 24" duct opening (measured at the opening)

8" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] sidewall Actual Filter Size – 27+ Product Details Size 8"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 5. 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