Stable Performance: The bottom of the soldering iron tip head is smooth and stable, the solder joint is smooth and even after welding, the tin is smooth and more reliable. High Sensitivity: Solder tip is various processes, which can prolong the service life which is extremely sensitive to temperature change and has small heat loss. Features: Soldering Tips featured precision ground copper tips plated with metal. easy to use, not easily oxidized. Mini Design: Size 5cm/1.97inch, compared with the traditional iron, this mini iron has a smaller section, which improves thermal conductivity and works efficiently! to Replace: USB Soldering Iron Tip welding tool accessory can be replaced freely, It is normal for the Tip to turn light yellow gray due to heat. Specification: Material: Copper Length 5cm/1.97inch Package Includes: 1 Soldering Iron Tip(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to between different monitors, the picture may not reflect the actual color the item. 3. Wish wonderful on-line shopping!