12" X 12" [Duct Opening] 2-Way Vertical Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 13.75"W X 13.75"H] 6in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height -

heat pump and centralized air ducted units

All of these grills have dampers

Actual Filter Size – 24 3/4"w x 25 3/4" x 1"

+ Product Details Size - 18"w X 16"h is the size for the duct opening measurement only

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