This is into the cable and fixing pins and PIN surface polished, implemented in a pipe coupling alignment. Outside the pin of the component made of metal or non-metallic materials. Butt end of the pins must be grinding and processing, usually in bending limits members to support at the other end fiber or fibre flexible cable to release the stress. Coupling pipes are generally made of ceramic, and bronze in half with materials such as synthetic, fastening cylinder components made of, equipped with metal or plastic flange, so that the fixed connector. As accurately as possible at the fiber optics, precision machining of the coupling pin and tube is high.