24" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 box-shadow: 0 4px 8px rgba(0

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+ Product Details Size – 24"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – 24"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 16"w X 14"h is the size for the duct opening measurement only

24" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 box-shadow: 0 4px 8px rgba(0+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 30" OR 30" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 29. 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