16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" + Product Details Size -

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

9% Pure Copper)

featuring a sleek ½” fin design

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 24" OR 24" x 20" duct opening (measured at the opening)

+ Product Details Size - 24"w X 30"h is the size for the duct opening measurement only

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" + Product Details Size -+ Product Details Size 16" x 30" or 30" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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