1、COMPLETE KIT: The kit includes heating tube, thermistor, heat sink, heating block, pneumatic connector, throat, PTFE tube, 0.4mm nozzle, sprinkler insulation silicone cover 2、HIGH AND LOW TEMPERATURE RESISTANCE: The operating temperature range of this kit is ‑40 to +260°C, which is high temperature and low temperature resistance 3、EASY INSTALLATION AND REPLACEMENT: 2 pre opened holes make the installation and replacement of hot end on the printer easier, the structure is very sturdy and stable 4、PREMIUM MATERIALS: The kit is made of high quality brass, ABS, aluminum alloy and stainless steel materials, features high strength, corrosion resistance, long last durability 5、SCOPE OF APPLICATION: This kit is suitable for 0.4mm nozzle, mainly used for ENDER3 series, for TEVO, for ALFWISE series 3D printers