The Door Heater Wire Heater is composed of three parts: metal braid layer, insulation outer layer and wire core. The metal braided layer material has three kinds of glass fiber, stainless steel, aluminum, the insulation layer is made of silicone rubber, silicone rubber is soft, good insulation, and high temperature and low temperature resistance, high temperature resistance up to 400 degrees can still be used normally, and the softness is unchanged, uniform heat dissipation, so the silicone heat application range is very wide.