... 2.W-2,Q/ZYH 201-2000 3.OEM,ISO9001 99.98% Pure Tungsten Bar Product:W-2 fine particle tungsten ... bar& rodPurity:99.98% Specification: RF1212300,RF121250Quality: Q/ZYH 201-2000Chemical Composition (%) ... Main Comp. W≥99.98Other Content≤Fe0.0026Al0.0006Si0.001Ca0.001Ni0.0009O0.0018Cu0.0005N0 ...