Finned stainless steel heaters evenly distribute high temperature resistance wires in high temperature resistant stainless steel seamless tubes, densely fill the gaps with good thermal conductivity and insulation performance. Crystalline oxidized money powder, this structure is not only advanced. High thermal efficiency, and heat Even. When current flows through the high-temperature cathode wire, the generated heat expands to the surface of the metal tube through the crystallized magnesium helium powder, and then transferred to the heated part or air to achieve the purpose of heating