16" x 16" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -

+ Product Details Size - 24"w X 24"h is the size for the duct opening measurement only

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

production and finish on all products

+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

16" x 16" Cube Core Eggcrate Return Air Grille w20h20 + Product Details Size -+ Product Details Size 16" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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 electric