30" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coat actual front end outer dimensions

actual front end outer dimensions are approximately 27 5/8" width X 32 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 6" OR 6" X 18" duct opening (measured at the opening)

actual front end outer dimensions are approximately 26 5/8" width X 12 5/8" height

actual front end outer dimensions are approximately 27 5/8" width X 20 5/8" height

75"H – fits a 24" X 6" duct opening

30" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coat actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 34" OR 34" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 33. 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