24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling + Product Details Size –

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

+ Product Details Size - 30"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

+ Product Details Size - 34"w X 26"h is the size for the duct opening measurement only

24" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 23. 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 from