Function : 1. These tips are made of copper, easy to tin and diamagnetic, suitable for soldering at lower temperatures 2. There are total 10 types of soldering tips in this set, and you can choose the suitable one for your different soldering needs 3. Do not leave the iron on for many hours if you are not using it. This can cause the tip to become covered with black oxide 4. Try tinning the tip while it heats up. If you leave it on for too long or run it too hot, the solder will burn and turn black again 5 . These soldering tips are suitable for soldering stations 936, 937, 938, 969, 8586, 852D Specification: Description: Copper soldering tips are suitable for soldering at lower temperatures. There are 10 types of soldering tips in this set, and you can choose the suitable one for different soldering needs, such as shape b universal, which can be used from any direction and easy to hold in any position, can be soldered on any surface from small to large; and the k-type shape is knife-shaped and allows soldering by applying the tip in 3 ways: linear, frontal and spot, it is used for soldering narrow pitches, bridging correction and drawn soldering. Get this set of tips and make soldering easier. Features : These tips are made of copper, easy to tin and diamagnetic, suitable for soldering at lower temperatures. There are total 10 types of soldering tips in this set, and you can choose the right one for your different soldering needs. Do not leave the iron on for many hours if you are not using it. This can cause the tip to become covered with black oxide. Try tinning the tip while it heats up. If you leave it on for too long or run it too hot, the solder will burn and turn black again. These soldering tips are suitable for soldering stations 936, 937, 938, 969, 8586, 852D. Technical data : Material: copper Length: approx. 42mm / 1.65 inch Outer Diameter: 6mm / 0.23 " Inner Diameter: 4mm / 0.15 " Temperature range: 200480 Shape: B, K, SK, 0.8D, 1.2D, 2.4D, 3.2D, 1C, 2C, 3C Quantity: 1 pc. (10 pcs in total ) Suitable for: 936, 937, 938, 969, 8586, 852D soldering station The package includes: 10pcs x soldering tips