Product details
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.
Characteristics
 Good mechanical and temperature performance
 High strength loose tube that is hydrolysis resistant
 Special tube filling compound ensure a critical protection of fiber
 Specially designed compact structure is good at preventing loose tubes from shrinking
 Crush resistance and flexibility
 PE sheath protects cable from ultraviolet radiation
 The following measures are taken to ensure the cable watertight:
 Steel wire used as the central strength member
 Loose tube filling compound
 100% cable core filling
 PSP enhancing moisture-proof
Standards:IEC 60794-1. 
Technical Parameters.

Note:
 Suffix X denotes fiber type.
 The nominal value of the PE sheath thickness is 1.6mm