10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille Insulated Line 4" X 12" Is The

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

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creating a quiet and efficient environment

finished in sleek chrome

10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille Insulated Line 4" X 12" Is The+ Product Details Size 10" x 30" or 30" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 31. 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