26" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in 180 Degrees Double Direction Adjustable

180 Degrees Double Direction Adjustable - Fins Are Manually Adjustable Individually for Optimal Air Distribution

and the second number represents the height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening)

+ Product Description Ventilate your home or commercial space with our Aluminum Outdoor Weatherproof Louvers

26" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in 180 Degrees Double Direction Adjustable+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 8" OR 8" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 7. 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