22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in + Product Details Size -

+ Product Details Size - 8" Diameter is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 14 5/8" height

+ Product Details Size – 10" x 22" or 22" x 10" is the size for the duct opening measurement only

Design – 180 degrees double direction adjustable - fins are manually adjustable individually for optimal air distribution

22" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 20" OR 20" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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