10" x 18" or 18" x 10" Cube Core Eggcrate Return Air Grille Return Grille these grilles ensure easy

these grilles ensure easy

please note that the total outer dimensions of the grille measure 14" in diameter

+ Product Details Size - 12"w X 24"h X 2"d (for duct opening measurement only)

75" width X 5

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

10" x 18" or 18" x 10" Cube Core Eggcrate Return Air Grille Return Grille these grilles ensure easy+ Product Details Size 10" x 18" or 18" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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