10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -

+ Product Details Size - 12"w X 12"h is the size for the duct opening measurement only

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High Quality – High-quality aluminum with counter-sunk screw holes (screws included) and no sharp edges

provides a modern look and quiet operation due to its half-inch by half-inch cube design

+ Product Details Size – 6" x 6" is the size for the duct opening measurement only

10" x 30" or 30" x 10" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -+ 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