32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Size -

+ Product Details Size - 36"w X 6"h is the size for the duct opening measurement only

Optional Butterfly Damper Available At Asin: B007CNEL1W

+ Product Details Size - 10"w X 8"h is the size for the duct opening measurement only

5"w X 12"h]

32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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 Made from