12" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] Outdoor Vent Covers actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 16 5/8" height

+ Product Details Size - 25"w X 16"h is the size for the duct opening measurement only

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

Every grille has a front end frame

Actual Filter Size – 31 3/4"w x 11 3/4" x 1"

12" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] Outdoor Vent Covers actual front end outer dimensions+ Product Details Size 12"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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