8" x 30" or 30" x 8" Cube Core Eggcrate Return Air Grille Powder Coated See chart below:

See chart below:

+ Product Details Size – 24" x 24" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 19

+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

Crafted for durability and rust-resistance

8" x 30" or 30" x 8" Cube Core Eggcrate Return Air Grille Powder Coated See chart below:+ Product Details Size 8" x 30" or 30" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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