Non-metal chains; Chain links of non-metallic materials; Articulated chains of plastic, for holding and guiding flexible tubes, electricity conduits and lighting cables; Energy chains for guiding hoses and electric cables for use on machines, in particular drilling machines, drilling apparatus and drilling derricks; Intermediate links of plastic for dividing the space for holding the aforesaid chains; Open and closed guide channels of plastic for the aforesaid chains; Fastening tabs, Clips, Being of plastic, for use in relation to the following goods: teed, Power strips and Ducts; Strain relief devices, namely, Cable clips, wire connectors, Hinges, not of metal for the fastening of electrical cables, Non-metallic panels; Comb bars having cable fasteners of plastic; Toothed and insulating clamps of plastic; Connection fittings for electrical protection tubes, in particular plastic holders for mounting; Pipe fasteners, connectors and holders, non-metallic; Cable fasteners, connectors and holders, non-metallic; Bands, not of metal, for fastening purposes, for use in relation to the following goods: cables and teed; Pipe clamps of plastics, Constructions of plastic for holding guide channels; Carriers of plastic for the moving ends of articulated chains, and parts therefor