Features:1. These tips are made of copper and are not electroplated, easy to tin and diamagnetic, suitable for soldering at lower temperature.2. There are 5 shapes of soldering tips in this kit, and you can choose the right one for different soldering needs.3. Do not leave the iron on for hours if you are not using it. This can make the tip receive black oxide.4. Try quoting the tip as it heats up. If you leave it on for too long or run it too hot, it will burn the solder and it will be black again.5. These soldering tips are suitable for soldering stations. Specifications:● Material: Copper● Type: Lead Free● Temperature Range: 180-500(°C)● Shape: 5pcs/box (I+B+K+2.4D+3C)● Suitable for: Soldering Station● Quantity: 5pcs/1set●Package Contents: 5pcs x Soldering Tips (I+B+K+2.4D+3C)Note:● Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you bid ● Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Note: It all depends on the actual product, the picture is just for reference.