Purity: 99.98% Diameter: 17.5mm Length : (720-750)mm Weight : 3kg / pc Packaging: Wooden box Applications: Mainly used for foundry materials, tool bit of processing lathe, and conductors, steel-making burdening and additives, crankshaft and cylinder burdening and electrodes for advanced automobiles; for the manufacture of guns, artillery, rockets, satellites, aircrafts and ships. Component Analysis (%) Main contents W: 99.98 Contents of other elements Fe 0.0026 Al 0.0006 Si 0.001 Ca 0.001 Ni 0.0009 O 0.0018 Cu 0.0005 N 0.0015 Pb 0.0001 Sn 0.0001 Sb 0.001 As 0.001 Cd 0.0001 Mg 0.0006 C 0.002 Bi 0.0001 Mo 0.003 - - Wooden box.