6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Grille Powder Coated accordion-header')

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European: EN 10270-1-SM

+ Product Details Size - 36"w X 4"h is the size for the duct opening measurement only

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6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Grille Powder Coated accordion-header')+ Product Details Size 6" x 24" or 24" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 8. 5" X 26. 5". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing