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

actual front end outer dimensions are approximately 34 5/8" width X 16 5/8" height

+ Product Details Size – 34"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 28"w X 18"h is the size for the duct opening measurement only

The smooth

26" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 20" OR 20" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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