100% brand new and high quality. Power: 30 40 60 80 100 150 200 300W. Voltage: 220V/ 50Hz. Quantity:1pc. Fit for External heating soldering iron. The heating element of the iron core is the best alternative to the old core, ensuring the efficiency and long life of the iron. Size: 30W: Outer diameter:10mm.Inner Diameter:4mm, 40W: Outer diameter:11mm.Inner Diameter:5mm, 60W: Outer diameter:12mm.Inner Diameter:6mm, 80W: Outer diameter:13.5mm.Inner Diameter:7mm, 100W: Outer diameter:15.8mm.Inner Diameter:8mm, 150W: Outer diameter:15.8mm.Inner Diameter:10mm, 200W: Outer diameter:23.5mm.Inner Diameter:14.2mm, 300W: Outer diameter:26.3mm.Inner Diameter:18mm. Package Include: 1pc Heating Core. Note: 1.Transition: 1cm=10mm=0.39inch, 2.Please allow 1-3mm error due to manual measurement, 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item.