10" x 6" or 6" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 8.5"] w18h18 Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

+ Product Details Size – 6" x 10" or 10" x 6" is the size for the duct opening measurement only

and yet lightweight and easy to handle

Each grille is carefully packaged with cardboard backing to prevent damage during shipment

10" x 6" or 6" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 8.5"] w18h18 Actual Filter Size – 33+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 6" or 6" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 5. 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 Made