Feature 1Premium Material: Made of high quality aluminum alloy and plastic materials, durable and long service life. High performance and fine workmanship. 2Good Heat Dissipation: Double fan heat dissipation, strong heat dissipation capacity, to protect your motor, to make the remote control car use longer. 3Reduce Motor Heat: The upgraded components will greatly reduce the heating of the motor, convenient installation and disassembly, easy to use. 4Main Functions: Cooling fan can control temperature, heat dissipation, prevent the engine from overheating, and make the equipment run efficiently. 5Reduce Motor Temperature: Dual fan motor radiator adopts strong wind high speed design, can effectively reduce the motor operating temperature.Item Type: Dual Fan Motor Heatsink Material: Aluminum Alloy and Plastic Weight:134g or 4.7ozVoltage: 8.4VMaximum Speed: 16000RPMFan Size:40x40mm or 1.6x1.6inRadiator Size: Approx. 80x64.2x57.2mm or 3.1x2.5x2.3inApplication: Suitable for Brushless Motors with a Diameter of 55mm or 2.17in, 56mm or 2.2in, 58mm or 2.28in (such as: 5682 or 5692 or 56112 Brushless Motor), Suitable for 1 or 5 Remote Control Car Package List:1 x Dual Fan Motor HeatsinkNote1. Since it is manual measurement, please allow an error of 13mm, thank you 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. The motor is not included in the delivery. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.