PACKAGE CONTENT - 12 Pieces different models welding head: 900M- B, 900M- I, 900M- K, 900M- 0.8D, 900M- 1.2D, 900M- 1.6D, 900M- 2.4D, 900M- 3.2D, 900M- 2C, 900M- 3C, 900M- 4C and 900M- SI MATERIAL - These tips are made of metal material, fit for lead-free soldering, can fit on many kinds DIY Electronic Repair. EASY TO USE - Heat quickly with base, good ability to hang tin, not easily oxidized. Great solder tips which compatible with a lot of soldering station. WIDE APPLICATION - Soldering iron widely used for welding circuit board, appliance repair, home DIY hobbyists,jewelry welding BE COMMON IN - Suitable for 936, 937, 938, 942, 951, 969, 907, 907-ESD, 900M, 900M-ESD, 852, 852D soldering iron stations Features: Stable and reliable quality for safe and practical use. This soldering iron tip is easy to take and clean. Easy to use and can bring you much convenience. : Product name: Soldering Iron tips Hole outer diameter: 6.5mm Hole inner diameter: 4.2mm Applicable temperature: 200 Celsius - 480 Celsius colour: silver Material: metal Package Contents: 12 x Soldering Iron Tip Warm Notice: 1. Please kindly check the size data in listing photo before purchasing and avoid buying wrong soldering tips. 2. All the welding had been done in low temperature as possible.Do not exert too much pressure. Please keep clean. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.