14" x 20" or 20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 16.5" X 22.5"] Black + Product Details Size –

+ Product Details Size – 18"w X 8"h is the size for the duct opening measurement only

Key Features:

+ Product Details Size - 8"w X 22"h is the size for the duct opening measurement only

75" width X 9

14" x 20" or 20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 16.5" X 22.5"] Black + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 20" OR 20" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 19. 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