14" x 24" or 24" x 14" Cube Core Eggcrate Return Air Grille ceiling + Product Details Size -

+ Product Details Size - The listed 10" diameter refers specifically to the size of the duct opening

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

+ Product Details Outer dimensions: – fits a duct opening

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

14" x 24" or 24" x 14" Cube Core Eggcrate Return Air Grille ceiling + Product Details Size -+ Product Details Size 14" x 24" or 24" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 25. 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