8" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] 18in diameter Efficient Airflow Design: The slots

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

high-impact clear plastic

Actual Filter Size – 25 3/4"w x 35 3/4" x 1"

+ Product Details Size - 24"w X 16"h is the size for the duct opening measurement only

this model ensures top-notch air quality

8" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] 18in diameter Efficient Airflow Design: The slots+ 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