10" x 26" or 26" x 10" Cube Core Eggcrate Return Air Grille Powder-Coated + Product Details Size -

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

and versatile for any project

+ Product Details Size - 28"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 4"w X 14"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 16" duct opening (measured at the opening)

10" x 26" or 26" x 10" Cube Core Eggcrate Return Air Grille Powder-Coated + Product Details Size -+ Product Details Size 10" x 26" or 26" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 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