18"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille Powder Coated But they are also the

But they are also the most visible representation of you air system

width: 20px

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

height: 22px

actual front end outer dimensions are approximately 8

18"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille Powder Coated But they are also the+ Product Details Size 18"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 85" width X 9. 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