6" x 26" or 26" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 28.5"] Color_R-8.0 Pink Actual Filter Size – 33

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

Actual Filter Size – 13 3/4"w x 27 3/4" x 1"

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actual front end outer dimensions are approximately 22 5/8" width X 10 5/8" height

+ Product Details Size – 30"w X 26"h is the size for the duct opening measurement only

6" x 26" or 26" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 8.5" X 28.5"] Color_R-8.0 Pink Actual Filter Size – 33+ Product Details Perfect Fit & Easy Sizing Designed for a 6" x 26" or 26" x 6" duct opening (measured at the opening), with actual outer dimensions of 8. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 5. 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