Plastics in extruded form for use in manufacture; stopping materials, namely, packing and insulating materials; flexible pipes, not of metal; semi-finished synthetic resins; semi-finished plastics in the form of films, sheets, pellets, rods, foams and fibers for use in dental industry; semi-worked plastic substances in the form of films, sheets, pellets, rods, foams and fibers for use in dental industry; gums unprocessed; rubber, raw or semi-worked; rubber sheets and pipes; semi-processed pla...