22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 30 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 8" OR 8" x 24" duct opening (measured at the opening)

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

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22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 30" OR 30" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 29. 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