The soldering iron core is the key component of the electric soldering iron. It is formed by winding the heating wire parallel on a hollow porcelain tube, the mica sheet in the middle is insulated, and two wires are led out to connect to the 220V AC power supply. Soldering iron heating element has the advantage of simple structure, small size, fast heating speed, uniform heating and more. we have the perfect after-sales service and technical support. Look forward to your cooperation!