Features: Experience efficient heat conduction and rapid heating with our external heating mica soldering iron cores, designs to enhances precisions in soldering tasks and boost your work efficiency. Crafted from premium mica, this soldering iron cores is high temperatures resistant and offers long lifespans, with a precise power control for great performances. Ideal for electronics repair technicians, craft enthusiasts, and small crafting making who require reliable and precise soldering tool. Perfectly suited for circuit board repairs, electronic component soldering, and small metal connection, ensuring versatility across various applications. Upgrades your toolkit with this essential soldering accessories, engineered to deliver consistent result and meet the demands of intricate soldering projects. Specifications: Component: Mica Plate Color: As pictures shown. Optional Power: 30W, 40W, 60W, 80W, 100W, 150W Size: As pictures shown. 30W: 55x9mm/2.16x0.35in; Inner Diameter: 4.1mm/0.16in 40W: 56x11mm/2.2x0.43in; Inner Diameter: 5.1mm/0.20in 60W: 55x12mm/2.16x0.47in; Inner Diameter: 6.1mm/0.24in 80W: 78x14mm/3.07x0.55in; Inner Diameter: 7.1mm/0.27in 100W: 78x16mm/3.07x0.62in; Inner Diameter: 8.2mm/0.32in 150W: 82x20mm/3.22x0.78in; Inner Diameter: 10.5mm/0.41in Quantity: 1pc Package Includes: 1pc Soldering Iron Cores note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.