10"w X 10"h [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] Compatible With Duct 6in listed size +2"

listed size +2"

+ Product Details Size - 30"w X 16"h is the size for the duct opening measurement only

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

+ Product Details Size – 8"w X 10"h is the size for the duct opening measurement only

10"w X 10"h [Duct Opening] 3-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 11.75"H] Compatible With Duct 6in listed size +2"+ Product Details Size 10"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" width X 11. 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