10"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] 12in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 28 5/8" height

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

+ Product Details Size – 28"w X 26"h is the size for the duct opening measurement only

Actual Filter Size – 11 3/4"w x 9 3/4" x 1"

listed size +2" diameter

10"w X 8"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 9.75"H] 12in diameter actual front end outer dimensions+ Product Details Size 10"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 9. 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