High pressure precision valves of metal (other than parts of machines, engines or motors); hydraulic connectors (pipes) of metal (other than parts of vehicles, machines or motors); insulated metal pipes (other than parts of machines, engines or motors); insulated metal tubing (other than parts of machines, engines or motors); metal high pressure hoses (other than parts of machines, engines or motors); non-electric coupling devices of metal other than parts of machines, engines or motors