12"w X 18"h Aluminum Adjustable Return/Supply HVAC Air Grille - FULL CONTROL HORIZONTAL AIRFLOW DIRECTION Fixed Blades justify-content: center

justify-content: center

Width vs Height:

provides a modern look and quiet operation due to its half-inch by half-inch cube design

The total outer size of this grille is the listed size plus 1

12"w X 18"h Aluminum Adjustable Return/Supply HVAC Air Grille - FULL CONTROL HORIZONTAL AIRFLOW DIRECTION Fixed Blades justify-content: center+ Product Details Size 12"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 85" width X 19. 85" height. High Quality Rigid aluminum construction with counter sunk screw holes (screws included) and no sharp edges. Installation Location Sidewall and ceiling. Design Unrestricted airflow for your HVAC system adjustable one way louver with full horizontal airflow directional control single