28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in actual front end outer dimensions

actual front end outer dimensions are approximately 9

actual front end outer dimensions are 7" diameter

with actual outer dimensions of 38

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

28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 8" OR 8" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 5. 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