20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 28" OR 28" X 14" duct opening (measured at the opening)

+ Product Details Outer dimensions: 31

with actual outer dimensions of 38

ensuring consistent temperature control

75"H – fits a 24" X 4" duct opening

20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 6" OR 6" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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 Made