GoolRC RC Helicopter Tail Motor Metal High Efficient Heat Sinks Set 7mm for Wltoys V977 V966 Skyartec NANO CPX-Red RC Helicopter Tail Motor Metal High Efficient Heat Sinks Set 7mm for Wltoys V977 V966 Skyartec NANO CPX High quality and durable in use Easy to install 100% Brand New Wltoys V977 V966 Skyartec NANO CPX Tail Motor Metal High Efficient Heat Sinks Set