24" x 36" or 36" x 24" Cube Core Eggcrate Return Air Grille 12" Diameter each available in a variety

each available in a variety of high-quality materials like brushed nickel

+ Product Details Size – 20" x 30" or 30" x 20" is the size for the duct opening measurement only

16" x 3" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

875" width X 6" height

24" x 36" or 36" x 24" Cube Core Eggcrate Return Air Grille 12" Diameter each available in a variety+ Product Details Size 24" x 36" or 36" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 75" X 37. 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