36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 20 5/8" height

The grille features counter-sunk screw holes that prevent paint from peeling during installation

this guard is designed to provide maximum protection against tampering while maintaining a clean and professional appearance

+ Product Details Size – 12"w X 26"h is the size for the duct opening measurement only

+ Product Details Size – 10" x 36" or 36" x 10" is the size for the duct opening measurement only

36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 16" OR 16" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 15. 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