6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 22.5"] Compatible with Duct 6" 75"H – fits a 18"

75"H – fits a 18" X 10" duct opening

75"H – fits a 14" X 12" duct opening

our Radial Damper simplifies the process of managing airflow

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

+ Product Description When it's time to upgrade your HVAC Vents in your house

6" x 20" or 20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 22.5"] Compatible with Duct 6" 75"H – fits a 18"+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 20" or 20" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 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 Made