14"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille 18in diameter } /* MORE SPACE BETWEEN

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+ Product Description Check out one of our most attractive and stylish grills

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

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14"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille 18in diameter } /* MORE SPACE BETWEEN+ Product Details Size 14"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 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