Metal hose fittings; Structural joint connectors of metal; Structure joint connectors of metal; Copper pipes; Pipe coupling of metal; Copper alloys; Junctions of metal for pipes; Rods of metal for welding; Junctions of metal for flexible pipes; Junctions of metal for rigid pipes; Metal pipe connectors; Metal pipe couplings; Metal junctions for pipes; Rotating junctions of metal for pipes; Junctions of metal for pipes including those from alloy steel and titanium