26" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 15 3/4" x 1"

actual front end outer dimensions are approximately 28 5/8" width X 14 5/8" height

The premium durable material guarantees that they will never rust or wear through

high-impact clear plastic

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