20" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] Compatible With Duct 8in actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 30 5/8" height

+ Product Spec Sheet

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height

actual front end outer dimensions are approximately 27 5/8" width X 8 5/8" height

+ Product Details Size – 22"w X 30"h is the size for the duct opening measurement only

20" X 6" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 21.75"W X 7.75"H] Compatible With Duct 8in actual front end outer dimensions+ Product Details Size 20"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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