28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 12 5/8" width X 30 5/8" height

75" Width X 9

+ Product Details Size – 28"w X 10"h is the size for the duct opening measurement only

75"H – fits a 20" X 8" duct opening

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28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 14" OR 14" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 13. 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