20"w X 10"h Aluminum Adjustable Return/Supply HVAC Air Grille White getElementById('hvac-product-accordion')

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strong aluminum construction with smooth finished edges for easy and safe use

By means of the smooth surface

+ Product Details Size - 18"w X 4"h is the size for the duct opening measurement only

20"w X 10"h Aluminum Adjustable Return/Supply HVAC Air Grille White getElementById('hvac-product-accordion')+ Product Details Size 20"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 85" width X 11. 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