Quality is a life of an enterprise. The quality of the fittings concerns the user's product quality and corporate image directly. The terminal quality lies in the quality of the copper material, the purity of the copper material and electric conduction rate become direct ratio. The terminal produced by our company is to use 99. 9% of the high purity industrial copper, plates inferior mere tin, rear and sews the place and welds the silver on the surface, interior holes with whorl line, imported insulation covering. It has the characteristic of international common color distinguish.