metal pipe fittings; fittings of metal for pipes; metal brackets; sheet metal; sheets and plates of metal; pipes of metal; water pipes of metal; elbows of metal for pipes; drainage pipes of metal; tubes of metal; metal joint connectors for pipes; valves of metal (other than parts of machines); metal valves for water pipes; manifolds of metal for pipelines; water pipe valves of metal; water-pipe valves of metal; grilles of metal; metal washers; bolts of metal; screws of metal; connectors of metal for tubes; couplings of metal for tubes; pipe couplings of metal; pipework of metal; metal building materials; branching pipes of metal; pipe connections of metal; water pipe valves (metal); metal panels