General description Good heat dissipation performance ensures safe and efficient operation of your remote control car. This aluminum alloy motor heatsink cover, equipped with a 5V cooling fan, effectively helps to form a better air channel and improve the heat dissipation effect, preventing the motor from overheating. Technical specifications Condition: 100% Brand New Item Type: RC Motor Heatsink Cooling Fan Cooling Fan Voltage: DC5V Applicable Motor: for 540, 550, 3650 Motor Fan Size: 30mm x 30mm x 10mm Color: Blue Material: Aluminum Alloy + Plastic Measurement allowed error: +/- 1-3 cm Package contents 3 x Motor Heatsink 3 x Cooling Fan Installation Easy and convenient to install and remove. Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing.