24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille w32h32 /* Adding space between bullet

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+ Product Details Size - 16"w X 6"h is the size for the duct opening measurement only

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

+ Product Details Size – 8" round duct opening

no professional tools needed

24" x 28" or 28" x 24" Cube Core Eggcrate Return Air Grille w32h32 /* Adding space between bullet+ Product Details Size 24" x 28" or 28" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 29. 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