E10 Welding : The E10 soldering tips set will provide you with all the soldering iron accessories you'll need for maximum results. Features: Precision ground copper tips are plated with iron, nickel and chromium, long lasting use life. Easy to use, not easily oxidized. Premuim Quality: Thread soldering tip is quality brass materials, not easily oxidized, strong and and resistant. Suitable For: This USB welding suitable for usb soldering iron E10 interface battery soldering iron soldering iron threaded soldering iron . Easy to Use: All soldering iron tips can be used, after soldering, there will be tin slag on the soldering iron tip, just wipe it off with this sponge, and the tin slag will fall off. Colour:silver Material:brass Package Contents: 2 X Soldering Iron Tip(tip B+tip K) 1 X Cleaning Sponge Only the above package content, other products are not included. Note: Light reflection 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.