THE FIBERS,EITHER OF SINGLE-MODE OR MULTIMODE TYPE,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 FOR CABLE WITH HIGH FIBER COUNT,LOCATES IN THE CENTER OF CORE AS A METALLIC STRENGTH MEMBER.TUBES ARE STRANDED AROUND THE STRENGTH MEMBER INTO A COMPACT AND CIRCULAR CABLE CORE.AFTER PSP IS APPLIED AROUND THE CABLE CORE,THIS PART OF CABLE ACCOMPANIED WITH THE STRANDED WIRES AS THE SUPPORTING PART ARE COMPLETET WITH A POLYETHYLENE SHEATH TO BE FIGURE 8 STRUCTURE.THIS KIND OF CABLE IS SPECIFICALLY APPLIED FOR SELF-SUPPORTING AERIAL INSTALLATION.