12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 8" duct openings

+ Product Details Size – 22"w X 18"h is the size for the duct opening measurement only

resisting rust and wear while adding a sleek

12" x 32" or 32" x 12" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade Actual Filter Size – 31+ Product Details Size 12" x 32" or 32" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 33. 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