new and high quality. There are total 15 shapes of soldering tips in this set and you can choose the proper for different soldering needs. Don't leave your iron running for hours and hours if you are not using it. This can make the tip get black oxide cover. These tips are made from copper and not electroplated, easy to tin and diamagnetic, suitable for lower temperature soldering. Try to tin the tip as it heats. If you leave it on too long or run it too hot it burn off the solder and go black again., Weight: 0.14660740423 pounds, Manufacturer: Histeaa