26" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in The total outer size of

The total outer size of this grille is the listed size plus plus 2 and 5/8"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 36" OR 36" x 20" duct opening (measured at the opening)

actual front end outer dimensions are approximately 22 5/8" width X 42 5/8" height

+ Product Description Upgrade your HVAC system with our heavy-duty

26" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 12in The total outer size of+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 30" OR 30" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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