22" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 + Product Details Size -

+ Product Details Size - 12"w X 26"h is the size for the duct opening measurement only

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Heavy Gauge Steel – Heavier gauge than needed

+ Product Details Size – 10"w X 18"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 28 5/8" height

22" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w16h16 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 10" OR 10" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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