22" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

75"H – fits a 16" X 4" duct opening

Actual Filter Size – 24 3/4"w x 15 3/4" x 1"

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22" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black Actual Filter Size – 31+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 36" OR 36" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 35. 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