22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter + Product Details Perfect Fit

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

+ Product Details Size – 12" x 22" or 22" x 12" is the size for the duct opening measurement only

+ 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 36 5/8" width X 20 5/8" height

875" width X 9

22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter + Product Details Perfect Fit+ 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