8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Grille + Product Description When it's

+ Product Description When it's time to upgrade your HVAC Vents in your house

During summer

Design – Designed to withstand bends and sharp turns without kinking

With precise measurements and easy installation

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

8" x 20" or 20" x 8" Cube Core Eggcrate Return Air Grille Grille + Product Description When it's+ 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