Feature: * 510 Interface Soldering Iron Tip, Portable USB Soldering Iron Tip Welding Rework Accessories Tool Parts 30W 2 inch (51mm). * 510 Interface Universal. * The difference between silver plated and bare copper is that silver plated is a layer of nickel-based plating pure copper to prevent oxidation and keep it bright silver. But the function and material are exactly the same. Specifications: Product Name: Soldering Iron Tip Material: Copper Optional Color: Silver, Gold Process: Silver Plated Length of Soldering Iron Tip: (Approx.) 51mm Power: 30W Type: B, C, K Connection Mode: 510 Interface Temperature Control Range: 500 deg;() Suitable for: portable USB welding tool Quantity: 3 pcs set Package includes: 3 soldering iron tip Note: 1. Transition: 1cm = 10mm = 0.39 inch.2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.