18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Size –

+ Product Details Size – 10" x 14" or 14" x 10" is the size for the duct opening measurement only

designed for both sidewall and ceiling installations

+ Product Details Size - 30"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

Easy Installation: Comes with mounting screws for a secure fit in minutes

18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille 10" Round Duct Pipe + Product Details Size –+ Product Details Size 18" x 26" or 26" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 75" X 27. 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