30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum [Outer Dimensions: 32

[Outer Dimensions: 32

+ Product Details Size - 25"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 34"h is the size for the duct opening measurement only

with no sharp edges to worry about

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum [Outer Dimensions: 32+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 11. 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