Skirting board duct 20x70, 2 soft lips, pure white. Electrical installation duct system SL, 2 or 3-track, consisting of a black-colored lower part, with one or two fixed partitions and a snap-on, covering upper part including accessories consisting of device carrier for central disk devices, device carrier for devices with cover frame and equipped device carriers with double Schuko socket and child protection, loudspeaker plug connection, antenna socket, double Schuko socket with overvoltage protection module and child protection or as an empty device carrier. Use of cut-concealing molded pieces for changes in direction. Open channel ends must be closed with end pieces.