brand:W3101 W3102 W34 W1 W2 Content: W3 W34 W2: W>=99.929% Character and usage W3101:twist wire; it has good character in high temperature and endurance.Second crystal temperature >=1950C,mainly used as filament wire in halogen,high temperature color filament,twist filament,white filament and fluorescence filament. W3102: it has good character in roll and high temperature.Second crystal temperature >=1850C,mainly used in white filament wire,vacuum tube heating wire. W34: used in twist wire W1/W2:used as frame of vacuum tube,heating elements. Super thin white tungsten wire. Specs :3-14 um Usage : electronic watch, electronic computer,mini-bulb and other precision equipment manufacture. We can supply black wire,polish white wire,and rectify white according to customers' requirement . In wooden box.