36" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core Carefully packaged for protection during

Carefully packaged for protection during shipment

+ Product Details Size - 6"w X 18"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 20" duct opening (measured at the opening)

High Quality – Commercial grade aluminum - will never rust - designed for warehouses

finished in sleek chrome

36" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Aluminum - Cube Core Carefully packaged for protection during+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 24" OR 24" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 23. 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