5v cartridge heater refers to a metal tubular single-head heating pipe. The armored single-head heating pipe is a spring electric heating wire placed in a metal sheathed pipe, and is uniformly filled with a thermal conductivity and a good insulation property in the gap portion. The magnesium oxide powder is reduced by the shrinking tube machine, so that the heating wire is insulated from the air, and the center position is not offset and hits the pipe wall, and is formed by shrinking, annealing, bending, welding fasteners and the like.
