TITAN IP55 92mm x 25mm Waterproof/Dustproof Case Cooling Fan Waterproof and dust-proof fan suits humid and high dust environments Excellent cooling performance Kukri-shaped blades generate outstanding airflow with excellent cooling performance Long life-time two ball bearing is suitable for high-temperature operating 92mm x 25mm 3 Pin fan (3.5" x 3.5" x 1") Rated Speed: 300010%RPM