HS Code Subheading 841990

8419.90.10 Parts of instantaneous or storage water heaters 8419.90.20 Parts of machinery and plant, for making paper pulp, paper or paperbroad 8419.90.30 Parts of heat exchange units 8419.90.50 Parts of molten-salt-cooled acrylic acid reactors, nesi; parts of certain medical, surgical or laboratory sterilizers, nesi 8419.90.85 Parts of electromechanical tools for work in the hand, w/self-contained electric motor, for treatment of materials by change in temperature 8419.90.95 Parts of machinery, plant or laboratory equipment for the treatment of materials by a process involving a change of temperature, nesoi