... 1-3.0mm 3>Application:heating,lighting, 4>Grade:W1,W2,WAL1,WAL2 Tungsten wire introduction1, Diameter: 0.01mm~2.00mm 2, ... Grade: W1, W2, WAL1, WAL2, 3, Density: Purity 99.92%, 99 ... 92-Manufacturing grid side rod of electron tube and reaming tungsten wire Certification Processing Equipment SHAANXI YUNZHONG INDUSTRY DEVELOPMENT CO.,LTD ...