8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Fixed Blades + Product Details Size -

+ Product Details Size - 34"w X 34"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 21 3/4" x 1"

875" width X 10" height

making it a reliable choice for improving indoor air quality

8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 12.5"] Fixed Blades + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 10" or 10" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 75" x 9. 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