Cooling fan Velineon VXL-3s ESC The Velineon VXL-3s Accessory Cooling Fan reduces ESC temperatures during extended operation for maximum power flow. It securely clips onto the VXL-3s heatsink for easy installation. Wires are neatly routed thanks to the integrated connector clip. Simply plug the accessory cooling fan into the Velineon VXL-3s accessory power connector and clip the fan onto the heatsink for increased cooling. Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your users manual for exact parts listings.