Internally coated pipe shells with click closure. Interior can be completely covered with cables and electrical installation pipes. European approved with ETA-13/0904. Fire resistance classes up to EI120. Closure with 2 foam plugs supplied. The surface is sealed with the ASX coating compound. In some applications, the use of metal tensioning straps to secure the pipe shells in lightweight partition walls is mandatory. Details can be found in the installation instructions/approval.