12"w X 6"h [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] white + Product Details Size -

+ Product Details Size - 12"w X 6"h X 2"d (for duct opening measurement only)

+ Product Details Size – 14" x 18" or 18" x 14" is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 33 3/4" x 1"

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+ Product Details Size - 20"w X 16"h is the size for the duct opening measurement only

12"w X 6"h [Duct Opening] 2-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 7.75"H] white + Product Details Size -+ Product Details Size 12"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" width X 7. 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