Assembled extruder kit, easy to use, compatible with Creality CR-6 SE 3D Printer. Self developed part, all metal design, Compatible With durable and wear resistant, high temperature resistance up to 260 . The inner wall of throat and nozzle is smooth, small movement resistance of filament, the melting is sufficient, and the extrusion is smooth. High Efficiency of Heat Conduction and high efficiency of Heat Dissipation.