This is a special Revo HeaterCore intended for use with the Revo CR. It uses a 40W heater and a 100K NTC thermistor, which has the same response as a stock Creality thermistor, saving you the hassle of any firmware changes to your Creality 3D printer. Also included are solderless, crimp-less butt splice connectors for easy connection. Please note: - This spare is Intended for Revo CR but can be used with any standard Revo HeatSink and nozzle. - Includes solder-less, crimp-less, butt splice connectors for easy connection to pre-existing wiring looms.