8" x 24" or 24" x 8" Cube Core Eggcrate Return Air Grille 18in diameter + Product Details Size –

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

High Quality – Solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

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

no exceptions

8" x 24" or 24" x 8" Cube Core Eggcrate Return Air Grille 18in diameter + Product Details Size –+ Product Details Size 8" x 24" or 24" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 25. 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