The fibers, 250µm, are positioned in a loose tube made of a high modulus plastic. The tubes are filled with a water-resistant filling compound. A steel wire, sometimes sheathed with polyethylene (PE) for cable with high fiber count, locates in the center of core as a metallic strength member. Tubes (and fillers) are stranded around the strength member into a compact and circular cable core. The PSP is longitudinally applied over the cable core, which is filled with the filling compound to protect it from water ingress. The cable is completed with a PE sheath.

• Multi-tube model: Steel tape Armoured steel band structure, excellent mechanical and environmental performance
• Rational design and accurate control of excessive length of the optical cable inside the loose tube to guarantee superior mechanical and environmental performance
• Single PE jacket, improves moistureproof high intensity, good counter side pressure resistant capability

With iron-wooden drum, with plastic protection caps. Attenuation performance data for each fiber inside.