36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" cursor: pointer

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actual front end outer dimensions are approximately 38 5/8" width X 32 5/8" height -

actual front end outer dimensions are approximately 30 5/8" width X 34 5/8" height

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actual front end outer dimensions are approximately 30 5/8" width X 32 5/8" height

36" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" cursor: pointer+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 6" OR 6" x 36" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 5. 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