High-flow hardened steel nozzle suitable for , good insulation/not easy to plug/suitable for high-temperature consumables. Quickly replace the nozzle, the replacement cost is lower, the nozzle part is made of hardened steel, which has high wear resistance and longer service life, and the nozzle can be upgraded and replaced. All-metal design, using three metals: the tip is hardened steel, the inner tube is titanium alloy TC4, and the rest is chromium zirconium copper ( nano coating) material with different thermal conductivity. Reduce the upward conduction of heat at the heating position, dissipate heat to accelerate heat conduction, reach ultra-high temperature, wear and corrosion resistance. The inner wall of the nozzle is smooth, burr-free, with a small viscosity coefficient, and smoother wire output. Note: Make sure the hot end has cooled before replacement. Just unscrew the old nozzle with your hand or a wrench and replace it with a new one. Please note: the physical slightly