No - metallic, flexible fiber optic cable with central tube gelled, which can be used both inside and outside the building. Fireproof cable outer shell contains no harmful halogens, so has the status of cable LSZH (Low Smoke Zero Halogen) allowing the use of cable inside the building. A large number of parameters increases aramid fibers and the strength of the cable antygryzoniwe drawing. Recommended for use in conditions of high nuisance rodents. Installation in cable ducts, cable trays or in a secondary sewer systems.