6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 26.5"] 10in diameter 85" width X 25

85" width X 25

[Outer Dimensions: 20

listed size +2"

actual front end outer dimensions are approximately 16 5/8" width X 28 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 8" duct opening (measured at the opening)

6" x 24" or 24" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 26.5"] 10in diameter 85" width X 25+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 24" or 24" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 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 Made