24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 6" x 36" or 36" x 6" is the size for the duct opening measurement only

+ Product Details Size – 10" x 22" or 22" x 10" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 8" or 8" x 14" duct opening (measured at the opening)

+ Product Details Size – 14"w X 16"h is the size for the duct opening measurement only

24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper + Product Details Size –+ Product Details Size 24" x 26" or 26" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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