8" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] 3-Way or 4-Way 75"H – fits a 16"

75"H – fits a 16" X 10" duct opening

+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are 16" width X 10" height

+ Product Details Size – 14"w X 10"h is the size for the duct opening measurement only

Achieve superior control over your indoor airflow for a more comfortable space

8" X 4" [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 9.75"W X 5.75"H] 3-Way or 4-Way 75"H – fits a 16"+ 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