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] Outdoor Vent Covers Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 4" duct openings

This grille enhances airflow efficiency

back blades made of black plastic for reduced air noise and discreet appearance

+ Product Details Size - 14" X 14" is the size for the duct opening measurement only

+ Product Details Size - 25"w X 25"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] Outdoor Vent Covers Ideal for Walls & Ceilings:+ 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