36" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille Actual Filter Size – 7

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

both individually adjustable

Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency

(Screws included)

Its elegant look and fine finish and the natural warmth of oak wood will change the appearance of the entire room

36" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille Actual Filter Size – 7+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 18" OR 18" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 17. 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