24" x 30" or 30" x 24" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size -

+ Product Details Size - 20"w X 28"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 14" in diameter

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

These are specially sized to fit into all drop ceilings

+ Product Details Size – 28" x 30 or 30" x 28" is the size for the duct opening measurement only

24" x 30" or 30" x 24" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade + Product Details Size -+ Product Details Size 24" x 30" or 30" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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