12" x 6" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 8.5"] w28h28 Suitable For Floor Wall &

Suitable For Floor Wall & ceiling Applications

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

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

+ Product Details Size – 18"w X 28"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 6" duct openings

12" x 6" or 6" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 8.5"] w28h28 Suitable For Floor Wall &+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 6" or 6" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 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