16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling + Product Details Size -

+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

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This versatile solution enhances air supply and adds a touch of class to your space

+ Product Details Size – 16" x 18" or 18" x 16" is the size for the duct opening measurement only

16" x 32" or 32" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 32" OR 32" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 31. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum