6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Grille Powder Coated European: EN 10270-1-SM

European: EN 10270-1-SM

professional look

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

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R Value Rating of Insulation - R3

6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Grille Powder Coated European: EN 10270-1-SM+ 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