14" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 5.75"H] RG66 Black-HP + Product Details Size –

+ Product Details Size – 26"w X 20"h is the size for the duct opening measurement only

Designed for optimal airflow and lasting durability

Actual Filter Size – 25 3/4"w x 7 3/4" x 1"

+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only

14" X 4" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 5.75"H] RG66 Black-HP + Product Details Size –+ Product Details Size 14"w X 14"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" width X 15. 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