17 Seals for pipes, tubes, flexible and corrugated pipes, connections and union pieces for cables and sockets made from plastic, branch pieces made from plastic, connection fittings for pipes, tubes, flexible and corrugated pipes used to protect electrical cables, not made of metal, connection/lug angles or bends used for pipes, tubes, flexible and corrugated plastic pipes and tubes used to protect electric cables not made from metal, semi-manufactured plastic products; extruded plastics, plastic foam and thermoplastic materials in the form of rods, plates, profiles, shaped sections and tubes as semi-manufactured products; packing, stopping and insulating materials; plastic tubes and pipes for sanitary and heating installations, co-extruded plastic tubes and pipes, multi layer tubes and pipes with at least one plastic layer and one metal layer, all goods included in class 17