20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coated + Product Details Size –

+ Product Details Size – 34"w X 24"h is the size for the duct opening measurement only

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 10" or 10" x 6" duct opening (measured at the opening)

please note that the total outer dimensions of the grille measure 10" in diameter

20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coated + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 6" OR 6" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 5. 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