16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling Our grilles feature a durable

Our grilles feature a durable powder-coat finish

actual front end outer dimensions are 17" Width X 17" Height

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Design – Individually adjusting curved blades for better air flow control

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling Our grilles feature a durable+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 26" OR 26" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 25. 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