Pure copper wire ,the copper volume ratio by 99.98% ,copper wire of high density, good conductivity , good extensibility and low resistivity. Pure copper wire is widely used in the transmission of CATV information, controlling the information cable, electronic line and so on The physical characteristic of Tinned pure copper wire:Specification(mm)Copper layer(volume ratio%)Extensibility(%)DC Resistivity(Ωmm2/m)Density(g/cm3)0.05-0.06≥99.98≥6≤0.0172418.890.07-0.09≥99.98≥10≤0.0172418.89