30" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Brown + Product Details Size -

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

Universal Fit – Dimensions of 6-3/8" wide x 3-1/2" high x 3" deep make it compatible with most standard thermostat models

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height

actual front end outer dimensions are approximately 12 5/8" width X 32 5/8" height -

powder-coated steel

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