26" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 16" or 16" x 10" duct opening (measured at the opening)

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+ Product Details Size – 8"w X 8"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 16 5/8" height

26" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling + Product Details Perfect Fit+ 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