6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 10in diameter } /* TITLE TEXT */

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85" width X 21

6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 10in diameter } /* TITLE TEXT */+ Product Details Size 6" x 28" or 28" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 29. 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