We offer Duct Fiber Optic Cable.Thefibres, 250m, are positioned in aloosetube made of a high modulus plastic.Thetubes are filled with a water-resistantfilling compound.The tube is wrapped with a layer of PSP longitudinally.Between the PSP and the loose tube water-blocking material is applied to keep the cable compact and watertight.Two parallel steel wires are placed at the two sides of the steel tape.The cable is completed with a polyethylene(PE) sheath.