8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille 6" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 28 5/8" height

Ideal for both residential and commercial environments

If you are looking to enhance your project with a top-of-the-line unit

Heavier gauge than needed

Constructed from high-impact

8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille 6" Diameter actual front end outer dimensions+ Product Details Size 8" x 18" or 18" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 19. 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