20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black actual front end outer dimensions

actual front end outer dimensions are approximately 30 5/8" width X 36 5/8" height

with actual outer dimensions of 30

ensuring your space stays dry and secure

this grille boasts a sleek frame that ensures a refined and seamless look

+ Product Details Size – 20"w X 40"h is the size for the duct opening measurement only

20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black actual front end outer dimensions+ 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