6" x 14" or 14" x 6" Cube Core Eggcrate Return Air Grille Aluminum Example: If your hole is

Example: If your hole is 20" wide by 14" tall

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+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

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6" x 14" or 14" x 6" Cube Core Eggcrate Return Air Grille Aluminum Example: If your hole is+ Product Details Size 6" x 14" or 14" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 15. 75". 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