10" x 14" or 14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 16.5"] Aluminum Adjustable Curved Blade + Product Details Size -

+ Product Details Size - 34"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 24 3/4" x 1"

This grill comes in four different designs

[Outer Dimensions: 16

and yet lightweight and easy to handle

10" x 14" or 14" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 16.5"] Aluminum Adjustable Curved Blade + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 14" or 14" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 13. 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