OP-4Å4(2õ2) -1.0 A cable optical is intended for a gasket in the cable sewage system, blocks, pipes, protective polyethylene pipes (including by the pneumatic method), in default of threat of damage by rodents. Single-mode.4 fibres.coils of mandrel(2 modules on 2 fibres). Dielectric central power element. Outward shell-polyethylene.