RC Car Motor Heatsink Cooling Fan with Thermal Sensor CNCAluminum Alloy Heatsink for 4268 4274 Motors 1/8 1/10 Buggy Cars. Features: This RC motor heat sink is specially designed for 4268-4274 motors of RC model car. The RC heat sink with thermal sensor is equipped with 5-10V cooling fan to protect your motor. The thermal sensor will accurately detect risingtemperature, when the motor is up to 40, the cooling fan will automatically turn on to cool the motor. The cooling fan can be powered up from the receiver,convenient and easy to use. With high quality material designed clamp shape andexquisite workmanship, the heatsink is durable for long term use. Specifications: Item name: Heatsink Cooling Fan with Thermal Sensor Color: Black Fan input: 5-10V Fan size: 40 * 40mm Clamp suitable for: 4268-4274 Motors Weight: 29g Package information: Package size: 8 * 7 * 5cm / 3.2 * 2.8 * 2in Package weight: 31g There might be some deviation due to manual measurement. Package List: 1 * Heatsink Cooling Fan with Thermal Sensor