8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille 14in diameter With a sleek

With a sleek

actual front end outer dimensions are 3"

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

+ Product Description Upgrade your ventilation with our premium grilles and registers

8" x 18" or 18" x 8" Cube Core Eggcrate Return Air Grille 14in diameter With a sleek+ 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