30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 12 5/8" width X 20 5/8" height

The crank handle lever makes it easy to adjust to every weather situation

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 22" or 22" x 10" duct opening (measured at the opening)

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Actual Filter Size – 31+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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