20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille + Product Details Size -

+ Product Details Size - 8"w X 24"h is the size for the duct opening measurement only

Perfect for both residential and commercial use

with actual outer dimensions of 12

+ Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only

Its linear bar design maximizes ventilation

20" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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 Made from