17 Rubber, gutta-percha, gum, asbestos, mica; Seals, sealants and fillers; Semi-worked plastic substances; Rubber bands; Flexible pipes, tubes, hoses and fittings therefor (including valves), and fittings for rigid pipes, all of the aforesaid of rubber, gutta-percha or gum; Packing, stopping and insulating materials; Hoses, not of metal, in particular hydraulic hoses, high pressure hoses and industrial hoses; Casings of rubber for tubes; Flexible tubing for insulation purposes; Flexible hoses of plastic or of rubber