6" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 7.75"H X 7.75"H] with filter Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

+ Product Details Size – 18"w X 25"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 6"h is the size for the duct opening measurement only

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

6" X 6" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 7.75"H X 7.75"H] with filter Actual Filter Size – 33+ Product Details Size 6"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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 Location