These soldering iron tips are electroplated Iron and Nickel which protect them from oxidation, characterized by heat resistant up to 480 ℃ and over 20000 welding joints with appropriate use. As the I type point is very , it fits for crafted workmanship, for example, about car problem, once micro switch had popped off the small circuit board, you found that the contacts for the micro switch is smaller than micro (smaller than a pin head), or soldering in a narrow space also for revising the tin bridge emerging from chip soldering. How about getting this set and making your soldering work easier? Specification: Material: Oxygen free Copper Color: Silver Plating: Iron and Nickel (Finish) Outer Diameter: approx. 6.7mm / 0.26" Inner Diameter: approx. 4.0mm / 0.16" Length: approx. 43cm / 16.93" Package Weight: approx. 47g Model: 900MTI Applicable to: 936, 937, etc. Temperature Range: 200-480℃ Quantity: 10pcs / bag Package Included: 1 x bag of 900MTI Soldering Iron Tips, Total 10pcs