This Kit is Upgraded, the heating block upgraded to chromium-zirconium copper nickel plating treatment, high temperature resistance 500C degree printing, fast heat conduction. The radiator and heat break can be disassembled and locked by the side fixed shaft to reduce the use cost. The interference of the TC4 titanium heatbreak tube and the heat block increases surface at the bottom of the throat to completely eliminate the phenomenon of falling off and reduces the possibility of leakage. The nozzle is connected by thread, and in contact with the bottom step of the heatbreak to completely solve the phenomenon of falling off and reduce the possibility of leakage. Size:0.4mm Colour:black Material:hardened steel Note:The nozzles had been updated which can not fit for old hotend and it will not work with 3rd party nozzles. The removable nozzle can be replaced , Save time. Package Contents: 1 x Hotend Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.