26" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black + Product Details Outer dimensions:

+ Product Details Outer dimensions: 25

Actual Filter Size – 33 3/4"w x 7 3/4" x 1"

actual front end outer dimensions are approximately 10 5/8" width X 16 5/8" height

Achieve the perfect airflow with adjustable control by rotating the middle disk

26" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black + Product Details Outer dimensions:+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 34" OR 34" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 33. 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