Flexible plastic corrugated pipe (corrugation) Kopos 1420D d20 black 50 m is used for installation of hidden electrical wiring. Suitable for installation on the surface, in screed, under plaster. It is used for installation in hollow walls, plastered walls and ceilings. For easy and safe tightening of the cable into the corrugation, a steel wire is stretched inside it. The corrugated pipe is made of self-extinguishing UV-resistant PVC, has a mechanical strength of 320 N per 5 cm. Installation is allowed in rooms with the possibility of explosion of combustible gases and vapors of zone 2, as well as in rooms with the possibility of explosion of combustible dust of zone 22.