ITEM NAME:Metal Heat Sink With Cooling Fan Parts for 1/10 HSP RC Car 540/550/3650 Motor Descriptio n Description: This heat sink is suitable for 540 / 550 / 3650 motor of RC model car. Equipped with 4.8-6V cooling fan to protect your motor. It has perfect heat dissipation effect which can effectively prevent the motor from overheating. The cooling fan can power up from the receiver, convenient and easy to use. With high quality materials and exquisite workmanship, it is durable for long term use. Specifications: Material: Aluminum Alloy Color: Random Color Size: 45*40*40mm Package Included: 1 *Â Heat Sink With Cooling Fan Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality buy, happy buyï ¼ Metal Heat Sink With Cooling Fan Parts for 1/10 HSP RC Car 540/550/3650 Motor.This heat sink is suitable for 540 / 550 / 3650 motor of RC model car. 1 Heat Sink With Cooling Fan. We'd like to settle any problem in a friendly manner. Equipped with 4.8-6V cooling fan to protect your motor.