10" x 22" or 22" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 24.5"] w8h8 + Product Details Size -

+ Product Details Size - 20"w X 10"h is the size for the duct opening measurement only

(Screws included)

+ Product Details 12"w X 4"h Is The Size For The Duct Opening Measurement Only

and Centralized Air Ducted Units

10" x 22" or 22" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 24.5"] w8h8 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 22" or 22" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 21. 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