10" x 24" or 24" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 26.5"] w25h25 + How To Measure A

+ How To Measure A Grille Measure the size of the vent opening

fasten the edges to studs with the provided screws

75" Width X 13

+ Product Details Size - 14"w X 12"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 4" duct openings

10" x 24" or 24" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 26.5"] w25h25 + How To Measure A+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 24" or 24" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 23. 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