8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Fixed Blades with Damper + Product Details Size -

+ 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

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

+ Product Details Size – 12"w X 6"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 + Product Details Size -+ 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