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 + Product Details Size –

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

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

This grille enhances airflow efficiency

Horizontal performance assures confident use of cooling temperature differential of 30 degrees Fahrenheit and greater

Actual Filter Size – 25 3/4"w x 17 3/4" x 1"

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 + Product Details Size –+ 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