8" x 12" or 12" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 14.5"] 8" Diameter + Product Details Size -

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

High Quality – high-quality steel with counter-sunk screw holes (screws included) and no sharp edges

actual front end outer dimensions are approximately 26

+ Product Details Size - 22"w X 24"h is the size for the duct opening measurement only

875" width X 26" height

8" x 12" or 12" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 14.5"] 8" Diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 12" or 12" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 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