✅ It includes a double-layer sheath: an inner steel or aluminum armor (PSP or APL) for mechanical protection and an outer polyethylene (PE) sheath for environmental resistance. Outdoor optical cable for communication with metal reinforcing member, loose tube stranded and filled, steel-polyethylene bonded sheath Loose tube construction, tubes jelly filled, elements (tubes and fillers when necessary) laid up around metallic central strength member, polyester yarns used to. DEKAM GYTS cables ensure reliable data transmission. The loose tube build protects all optical fibers inside. You gain dependable performance, outdoors and indoors. Specify fiber count, fiber type, sheath material (PE/MDPE), drum length, marking requirement. The optical to optical cableGYTS is designed with a steel-polyethylene bonded sheath and loose tube stranded structure.