17 Rubber and articles thereof, as far as included in this class; articles of plastics (semi-finished products); packing materials, stuffing materials and insulating materials, in particular, gaskets and packings for containers, fittings and mountings of containers and pipes, hoses, lines and couplings; flexible pipes (not of metal), flexible pipes of textile material; hoses, pipelines and conduits, couplings, hose clamps, hose and pipe adapters, as far as included in this class; couplings for flexible pipes; junction/connection pieces, hose fittings/hose couplings, as far as included in this class; connection pipes for adapters; accessories for hoses, namely, rubber collars, rubber seals; reinforcing materials, not of metal