The bers，250m，are positioned in a loose tube made of a high modulus plastic. The tubes are Iled with a water-resistant lling compound.A Fiber Reinforced Plastic (FRP) locates in the center of core as a non一metallic strength member. The tubes (and Hers) are stranded around the strength member into a compact and circular core. Then the cable core is covered with a thin polyethylene (PE) inner sheath，which  is Iled with jelly to product it from water ingress. A layer of water-blocking material is applied around the cable core to prevent water ingress all the same.After a corrugated steel tape armor is applied，the cable is completed with a PE outer sheath.

Good mechanical and temperature performance

High strength loose tube that is hydrolysis resistant

Special tube filling compound ensure a critical protection of fiber

Crush resistance and flexibility

The following measures are taken to ensure the cable wateright:

 1.Steel wire used as the central strength member

 2.Loose tube filling compound

 3.100% cable core filling

 4.PSP enhancing moisture-proof

 5.Water-blocking material