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

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

+ Product Details Size - 8"w X 8"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 8" in diameter

this filter grille never rusts and withstands long-term use in any environment

30" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 22" OR 22" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 21. 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