10" x 8" or 8" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 10.5"] fixed bar Actual Filter Size – 7

Actual Filter Size – 7 3/4"w x 17 3/4" x 1"

Actual Filter Size – 31 3/4"w x 5 3/4" x 1"

actual front end outer dimensions are approximately 24 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 26 5/8" width X 24 5/8" height

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