Copper Base Lead-free: Heat quickly with cooper base, good ability to hang tin Tips Electroplate Iron and Nickel: Tips Electroplated Iron and Nickel can make the tip difficult being oxidized. Lifetime no less than 25,000 welding spots 900M-T Series: There are total 10 shapes of soldering tips. Included shape I, SI, B, K, 1.2D, 2.4D, 3.2D, 2C, 3C and 4C tips for soldering the different components of PCBs Kinds of Soldering Stations: These soldering tips fit Hakko, Radio Shack 64-053, Atten, Quick, Aoyue, Yihua, X-Tronic,Vastar,Sywon,Tabiger,SOAIY and other brand iron station, such as 900M, 933, 936, 937, 376, 907, 913, 951, 898D, 852D+, 878AD Material: Oxygen-free Copper Surface Finishing: Electroplating (Iron & Nickel) Color: Silver Type: Lead-free Length: Approx. 42 mm / 1.65 inch Outer Diameter: 6 mm / 0.23 inch Inner Diameter: 4 mm / 0.15 inch Temperature Range: 200℃~480℃