6" x 12" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 14.5"] Adjustable Return When you're ready for a

When you're ready for a decor upgrade

+ Product Details Size - 8"w X 26"h is the size for the duct opening measurement only

+ Product Details Size – 18"w X 22"h is the size for the duct opening measurement only

This versatile guard features air circulating ports on all four sides to allow proper airflow

6" x 12" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 14.5"] Adjustable Return When you're ready for a+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 12" or 12" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 75" x 11. 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