... .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 ... wire, electrode, heater and contact materials and so on. 99.98% Pure Tungsten Bar