Features 1、These soldering iron heating elements are made of ceramic materials, two line heating mode, stable quality, superior performance 2、High quality heating cores are resistant to corrosion , oxidation acid, alkali, high temperature, and have long service life 3、Optimal performance, fast heating, high heating efficiency, fast heat conduction 4、Good insulation, anti-static, no electric leak, no flame, in order to ensure safety 5、Small size, light weight, 10 pieces in this set that suitable for internal heat soldering irons Specification Features: These soldering iron heating elements are made of ceramic materials, two line heating mode, stable quality, superior performance. High quality heating cores are resistant to corrosion , oxidation acid, alkali, high temperature, and have long service life. Optimal performance, fast heating, high heating efficiency, fast heat conduction. Good insulation, anti-static, no electric leak, no flame, in order to ensure safety. Small size, light weight, 10 pieces in this set that suitable for internal heat soldering irons. Specifications: Type: Internal heat Material: Ceramic Length: 8.3cm/3.26in Diameter: 0.4cm/0.15in Power: 20W Resistance: >100MΩ Quantity: 10pcs Package Includes: 10 x Heating Elements Note: Please allow small size error due to manual measurement. Thanks for your understanding. Package List