17 Unprocessed and semi-processed rubber gum, mica and substitutes for all these materials; plastics and resins in extruded form for use in manufacture; packing, stopping and insulating materials; flexible hoses, not of metal; semi-processed plastic materials, plastics in extruded form for use in manufacture; injection moulding plastics; synthetic resins, semi-processed; adhesive tapes, strips, bands and films; semi-processed synthetic resin compositions for industrial purposes; carbon fibre-reinforced synthetic resins for use in manufacture, semi-worked polymer resins; plastic filaments for 3D printing; filtering materials of semi-processed foams of plastic; filtering materials of semi-processed films of plastic