26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter with filter + Product Details Size –

+ Product Details Size – 12"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are 3"

crafted from heavy gauge steel for unparalleled durability

+ Product Details Size – 32"w X 34"h is the size for the duct opening measurement only

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

26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter with filter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 14" OR 14" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 13. 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