8" x 16" or 16" x 8" Cube Core Eggcrate Return Air Grille Color_White 4" X 10" Is The

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

High Quality – Solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

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+ Product Details Size – 30"w X 10"h is the size for the duct opening measurement only

8" x 16" or 16" x 8" Cube Core Eggcrate Return Air Grille Color_White 4" X 10" Is The+ Product Details Size 8" x 16" or 16" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 17. 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