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. Description Upgrade your Creality 3D printer HotEnd to Revo CR – a drop-in Revo upgrade for Creality 3D printers. Improve 3D print quality, machine safety, and enjoy all the benefits of the E3D Revo™ ecosystem.