YHM was established in 1979.The main products are Copper Alloy Wires included Brass Wire,Phosphor Bronze Wire, Silicon Bronze Wire, Nickel Silver Wire and EDM Wire.The wire material was metallurgy by advanced technology Upcast( Upward Continuous Casting ) .This technology similar to Semi-Conductors' grain size growth.It made material high purified,grain size uniformed and without joint in jumbo coil .It enhanced the electron transmission,voltage and current stable was used to advantage forEDM Wire products.