Description: Case Fan: Server Cooling Fan is great for Computer Cabinets, Pet Cooling, Ventilation Power Supply with Adjustable Speed and Quiet Operation. Quality: Case Cooling Fan is made of metal and other material, which are not easy to damage.Metal mesh cover: Electronic Component Fans with Metal mesh cover, which can effectively protect the fan.Adjustable: Router Fan has an Adjustable wind speed, you can set the speed at random.Widely Used: Brushless Cooling Fan is suitable for welding machine, instrument, meter, communication network, equipment cabinet, electric heater, pump and more. Specification: Standard:US plug Size Chart: single:12cmx12cmx2.5cm/4.72inchx4.72inchx0.98inch Package Includes: 2 Fan4 Metal mesh cover1 Speed regulator1 set Accessories1 set Screws Note: Please allow slightly errors 1-2cm differences due to manual measurement.