18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille white Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 14" duct openings

+ Product Details Size – 26"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 30"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 32"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 14"h is the size for the duct opening measurement only

18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille white Ideal for Walls & Ceilings:+ 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