10"w X 4"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 5.75"H] Aluminum Adjustable Curved Blade + Product Details Size -

+ Product Details Size - 30"w X 14"h X 2"d (for duct opening measurement only)

Round-neck-to-square-face construction results in 360 degree air diffusion pattern similar to a full round diffuser

+ Product Details Size - 25"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27

+ Product Details Size - 34"w X 26"h X 2"d (for duct opening measurement only)

10"w X 4"h [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 11.75"W X 5.75"H] Aluminum Adjustable Curved Blade + Product Details Size -+ Product Details Size 10"w X 4"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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