28" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe Design – Multi-shutter damper with

Design – Multi-shutter damper with handle lever for easy opening and closing - screws included

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Rust-Free Aluminum - Made from strong

+ Product Details Size - 24"w X 26"h is the size for the duct opening measurement only

28" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe Design – Multi-shutter damper with+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 24" OR 24" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 23. 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