Fittings of metal for flexible pipes; Junctions of metal for flexible pipes; Metal elbows for pipes; Metal hose fittings; Metal hoses for agricultural use; Metal hoses for plumbing use; Metal muntins; Metal pipe couplings; Metal pipe couplings and joints; Metal pipes; Pipe coupling of metal; Pipe tubes of metal; Rotating junctions of metal for pipes; Structure joint connectors of metal; Water-pipe valves of metal