12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter 12"w X 8"h Is The

12"w X 8"h Is The Size For The Duct Opening Measurement Only

Both lines taped together every 18in for easier handling & installation

actual front end outer dimensions are approximately 22 5/8" width X 32 5/8" height

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Actual Filter Size – 13 3/4"w x 15 3/4" x 1"

12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter 12"w X 8"h Is The+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 28" or 28" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 27. 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