24" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coated + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 28" or 28" x 6" duct opening (measured at the opening)

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

High Quality – High-quality

+ Product Details Size – 6" x 34" or 34" x 6" is the size for the duct opening measurement only

16" x 3" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

24" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder-Coated + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 28" OR 28" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 27. 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