OKP-12Å4(3õ4)-15 Optical cable,single-mode, with armor from steel zincked wires. It is intended for a gasket by the mechanized method in soils of all groups (except for soils subject to the deformations frozen condition of ground) and in soils of all groups in the opened trench; in the cable sewage system, pipes, blocks, at influence on the cable of the considerable stretching usiliy.12 fibres.4 elements in coils of mandrel.