Feature:1. Lightweight designs, will not add burden to your RC car, wonderful accessory.2. Easy and convenient for installation and disassemble, reliable and durable to use.3. Made of high quality materials, strong and durable, having long service life.4. Upgrade RC parts will greatly reduce the heat of the motor, wonderful accessory.5. Special designed for 1/10 RC car 540/550 brushed motor 3650/3660 brushless motor.Specification:Condition: 100% Brand NewItem Type: RC Motor Heat SinkMaterial: Aluminum Alloy + Plastic Optional Color: Blue, Red, SilverFan Input Voltage: 4.8~6VSuitable: 3.5 ~ 3.7cm / 1.4 ~ 1.5in motor can be installedSuitable Motor: for 540/550 Brushed Motor 3650/3660 Brushless MotorFitment: Fit for 1/10 RC car Fit for HSP 94111 / 94123 / 94107 / 94170.Package List:1 x RC Motor Heat Sink