8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper strong aluminum construction with smooth

strong aluminum construction with smooth finished edges for easy and safe use

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

actual front end outer dimensions are approximately 31

+ Product Details Size - 26"w X 14"h is the size for the duct opening measurement only

8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper strong aluminum construction with smooth+ Product Details Size 8" x 20" or 20" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 21. 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