According to industry sources, the price difference between the wires is huge because of the different raw materials used in the production process. The main raw materials for producing electric wires are electrolytic copper, insulating material and sheath material. At present, the raw materials market electrolytic copper per ton at more than 70,000 yuan, and recycled copper is much cheaper, insulating materials and sheath material quality products and defective difference. In addition, the length is insufficient, the insulating body contains the quantity of glue is not enough, also is the important reason that causes the price difference. The length of each line, the excellent product is a100 meters, and defective only about 90 meters; The insulator contains the superior product of 35%.