1. These soldering iron heating elements are made of ceramic materials, two-line heating mode, stable quality, superior performance2. High quality heating cores are resistant to corrosion, oxidation acid, alkali, high temperature and have long service life3. Top performance, fast heating, high heating efficiency, fast heat conduction4. Good insulation, anti-static, no electric leakage, no flame, to ensure safety5. Small size, light weight, 10 pieces in this set which are suitable for internal heat soldering irons Specification: Features:< br/>These soldering iron heating elements are made of ceramic materials, two line heating mode, stable quality, superior performance.High quality heating cores resist corrosion, acid oxidation, alkali, high temperature and have a long service life. Optimum performance, fast heating, high heating efficiency, fast heat conduction. Good insulation, anti-static, no electric leakage , no flame, to ensure safety.Small size, light weight, 10 pieces in this set which are suitable for internal hot soldering irons.Features:Type: Internal heatMaterial: CeramicLength: 8.3cm/3.26inchDiameter: 0.4cm/0.15inInput Voltage: 220V (50Hz)Power: 20WResistance: >100M?Quantity: 10pcsPackage includes:10 x heating elementsNote: Please allow a little size error due to manual measurement. Thank you for your understanding. Note: The data is manual measurement, please allow 1-82cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.