24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 Actual Front End Outer Dimensions

Actual Front End Outer Dimensions Are 14" Width X 4" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 4" duct openings

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 10" OR 10" x 28" duct opening (measured at the opening)

24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 Actual Front End Outer Dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 20" OR 20" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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