Abstract: The invention relates to cable ducts and solves the problem of making it possible alternatively to close a given duct either with a lid (9) or by snapping engagement between portions (6, 7) directed inwardly from the top portions of the side walls (2, 3) of the duct. The snapping means (8, 11, 12) are shaped and located in such a way that they may alternatively cooperate either mutually (8, 11, 12) or with a lid (9, 10).

Abstract: The invention relates to marking sleeves for electrical wires. It solves the problem of providing a sleeve which combines ease of manufacturing with possibility to use the sleeve on wires within a wide diameter range so that the sleeve is securely held in position also when carried by a thin wire. The sleeve is of the type made of a resilient synthetic resin and, according to the invention, its outer contour is substantially rectangular, whereas its inner contour, defining the passage, forms part-circular recesses for receiving wires within the lower portion of the diameter range.