The structure of GYXTS optical cable is to place 250u optical fibers in a loose tube made of high modulus plastic. These pipes are filled with a waterproof filling material. The pipe is wrapped in a layer of waterproof glass gauze. Add a corrugated steel strip to the yarn. There are two tear ropes between the glass yarn and the steel strip. The outer layer is made of high-density polyethylene (HDPE) sheath.