30" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 32 5/8" height

+ Product Details Size - 4"w X 26"h is the size for the duct opening measurement only

accordion-item')

+ Product Details Size - 18"w X 12"h X 2"d (for duct opening measurement only)

12"w X 3"h Is The Size For The Duct Opening Measurement Only

30" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 7. 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