Device carrier universal design for flush-mounted devices with frame SL 20x55mm graphite black. Device carrier for the electrical installation duct system skirting board duct in accordance with DIN EN 50085-1 as a device installation duct. Empty device carrier for snapping onto the skirting board duct lower section consisting of device carrier lower section with locking screw for installing suitable flush-mounted switch programs with design frame and device carrier upper section. Note: Device carrier apron universal design as a cover for the lower part of the channel below the device carrier for snapping onto the device carrier is not included.