30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 actual front end outer dimensions

actual front end outer dimensions are approximately 24 5/8" width X 18 5/8" height

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8" Diameter Is The Size For The Duct Opening Measurement Only

Plain Ends - Gives you the freedom to cut and flare at your own project needs

[Outer Dimensions: 22

30" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 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