8" X 4" [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 5.75"H] fixed bar + Product Details Size -

+ Product Details Size - 14"w X 18"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 26 5/8" height

75" Width X 13

Actual Filter Size – 15 3/4"w x 33 3/4" x 1"

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

8" X 4" [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"H X 5.75"H] fixed bar + Product Details Size -+ 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