Features: 1.MK8 Extruder Hot End Kit with 12V (CR10/10S) and 24V (Ender 3) optional 40W. 2.The red line is the temperature thermistor and the black line is the heating tube. 3.Nozzle, aluminum heating block, throat tube(built-in). 4.This extrusion head kit can be used with different sizes of MK8 nozzles: 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm. 5.12V for Corey CR10/CR10S/CR10S4/CR10S5 3D printer accessories, 24V for ender 3 models. specification: MK8 Extruder Hot End Kit with 12V (CR10/10S) and 24V (Ender 3) optional 40W. The red line is the temperature thermistor and the black line is the heating tube. Nozzle, aluminum heating block, throat tube(built-in). This extrusion head kit can be used with different sizes of MK8 nozzles: 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1.0mm. 12V for Corey CR10/CR10S/CR10S4/CR10S5 3D printer accessories, 24V for ender 3 models. s: Material: ABS + Metal Heating tube: 12V/40W, 24V/40W(optional) Throat length: Approx. 52mm/2.05inch Aluminum block size: Approx. 20*20*10mm/0.79*0.79*0.39inch Nozzle size: Approx. 0.4mm/0.02inch Cable length: Approx. 1m/39.37inch Installation type: External threaded connection Application: For Creality 3D Printer Operating temperature range: -40-260(-40-500F) Package list: 1 x MK8 Extruder Hotend Kit(include Heating Tube)