16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 14 5/8" height

this grille is a testament to high standard craftsmanship

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 8" duct openings

These are built heavy duty for installation into brick and cement walls

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling actual front end outer dimensions+ 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