Empty device carrier for support bar devices for SL 20x55mm decor aluminum. Device carrier for the electrical installation duct system skirting board duct according to DIN EN 50085-1 as device installation duct. Empty device carrier to snap onto the skirting board duct lower section consisting of device carrier lower section with locking screw for installation of support bar devices, cover (blank cover, cover for RJ45 2-way data connection, cover for 3-way antenna connection BK/SAT) and device carrier upper section. Note: The device carrier apron as a cover for the lower part of the duct below the device carrier for snapping onto the device carrier is not included.