22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line featuring a 8" round duct

featuring a 8" round duct opening

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+ Product Details Size – 18"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 22"h is the size for the duct opening measurement only

22" x 30" or 30" x 22" Cube Core Eggcrate Return Air Grille Insulated Line featuring a 8" round duct+ Product Details Size 22" x 30" or 30" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 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