The Ender-3-V3-SE extrusion head kit is an upgraded accessory designed specifically for series models such as the Creativity Ender-3-V3-SE. Its compact and lightweight characteristics make it easy to carry. The heating block is made of high-temperature resistant copper alloy, which can meet the requirements of high-temperature printing. The radiator and throat are fixed by the top line of the intermediate shaft, which is firmly connected and easy to disassemble. They are made of brass material and have excellent thermal conductivity. The heat block and nozzle for rapid heat dissipation are made of aluminum alloy, and the roughness of the inner walls of the pipeline and nozzle is controlled at Ra ≤ 0.4um, effectively reducing blockage and improving printing quality. The throat and heating block are equipped with threaded components, which can effectively reduce material leakage and detachment. The heating block component of this extrusion head kit can withstand high temperatures up to 260 ℃ and is compatible with various filament materials such as PLA, PETG, TPU, PP, and PC. Overall, the Ender-3-V3-SE extrusion head kit features high thermal conductivity and fast heating, utilizing advanced thermistors and heating tube components to quickly heat and accurately control nozzle temperature. Easy to install, can improve printing success rate, and provide excellent printing quality