Common metals and their alloys; Steel; Metal building materials, namely, steel welding rods, welding wires, metal nipples, metal couplings for pipes, metal couplings for flexible tubing, metal threatened fasteners; Metal pipes; Sheet metal; Steel sheets; Metal pipe connectors; Metal branching pipes; Pipe elbows of metal; Steel pipes; Stainless steel pipes; Metal pipe collars; Metal clamps; Metal pipe elbows; Valves of metal, other than parts of machines; Metal girders; Sealing caps of metal; ...

Common metals and their alloys; Steel; Metal building materials, namely, steel welding rods, welding wires, metal nipples, metal couplings for pipes, metal couplings for flexible tubing, metal threatened fasteners; Metal pipes; Sheet metal; Steel sheets; Metal pipe connectors; Metal branching pipes; Pipe elbows of metal; Steel pipes; Stainless steel pipes; Metal pipe collars; Metal clamps; Metal pipe elbows; Valves of metal, other than parts of machines; Metal girders; Sealing caps of metal; ...