Item Type: RC Car Motor Cooling Fan_x000D_Material: Aluminium Alloy_x000D__x000D_Size: Approx. 25x25x10mm/0. 98x0. 98x0. 39in_x000D_Working Voltage: DC 5-7. 4V 1Main Function: Keeps the motor under control so it runs efficiently and cool, cooling the ESC for maximum power during extended runs. 2Durable Materials: The fan is made of aluminum alloy and hard plastic, which is lightweight, high temperature resistant and fast in heat dissipation. 3Fine Workmaship: Exquisite appearance and stable performance make your remote control car look more realistic, cool and practical. 4Solid Construction: Small in size and light in weight, does not increase the burden on the remote control car, firm, stable and not easy to deform. 5Universal Fit: The working voltage is DC 5?7. 4V, 25x25x10mm size design, universal fit for most RC model cars.