18" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Its durability and performance contribute

Its durability and performance contribute to overall comfort

making it adaptable to various airflow needs

or commercial environment

75"H – fits a 12" X 10" duct opening

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height -

18" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Its durability and performance contribute+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 8" OR 8" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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