8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 24.5"] 1-Way Optional Butterfly Damper Available At

Optional Butterfly Damper Available At Asin: B007CNEL1W

Actual Front End Outer Dimensions Are 18" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

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8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 24.5"] 1-Way Optional Butterfly Damper Available At+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 22" or 22" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 75" x 21. 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