Optimus F-4092 9-Inch Industrial-Grade High-Velocity 2-Speed Fan Industrial Grade High-velocity Fan Reinforced Wire Grille.Single Unit Carton Size: 11.3 x 11.6 x 5.1 inches. Master Carton Size: 22.2 x 21.4 x 7.3 inch All Metal Construction Aluminum Heavy-duty Blade Industrial-grade high-velocity fan keeps the airflow moving Industrial-grade high-velocity fan keeps the airflow moving Powerful 2-speed high-torque motor; reinforced wire grill Adjustable tilt allows for ceiling to floor ventilation Measures 23-4/5 by 12-3/5 by 12-1/5 inches; 1-year limited warranty Industrial-grade high-velocity fan keeps the airflow moving Durable all-metal construction; 9-inch heavy-duty aluminum blade Powerful 2-speed high-torque motor; reinforced wire grill Adjustable tilt allows for ceiling to floor ventilation Measures 23-4/5 by 12-3/5 by 12-1/5 inches; 1-year limited warranty