... GYTA53 (GYSTA53)Product structure: PBT pine casing, metal center reinforcement, cable conductor filling ointment, aluminum - polyethylene bonding sheath, longitudinal bag wrinkles ... strip tidal.5. Double bond sheath, further improve the optical cable resistance to tide, resistance to lateral pressure, impact resistant ... 25 dOptical fiber some 2-144Cable diameter 13.5-20.5 mmCable weight 220-440 Kg/km