6 Common metals, unwrought or semi-wrought; metal alloys; forged metal fittings and articles, namely, low alloyed steels, stainless steel, duplex steel, super duplex steel, nickel, and super steel alloys, metal joinery fittings and metal forgings; metal tubes, pipes and fittings in the nature of metal alloy, duplex and super duplex tubing for chemical processing, wellhead, downhole and completion applications; metal latch bars and sheet metals; semi-wrought and unwrought common metals; unwrought steel, stainless steel, carbon steel, nickel, aluminum, zinc, titanium, unwrought or semi-wrought iron, unwrought or semi-wrought copper, chromium and their alloys; duplex steel, duplex steel articles, namely, hollow steel, bright steel, hot-rolled steel bars, tubes, plates, and steel rods; finished and semi-finished metal articles, namely, latch bars, tubes, and steel plates; finished and semi-finished metal articles, namely, cold-finished steel bars; finished and semi-finished metal articles for use in the oil and gas industry, namely, metal forgings, latch bars, tubes, and steel plates; finished and semi-finished metal articles for use in the oil and gas industry, namely, metal casings used to stabilize the wellbore in oil and gas wells; metal articles made from custom manufacture and assembly of metal articles, namely, latch bars, tubes, steel plates, and poles of metal; metal articles made by precision fabrication, namely, pre-fabricated metal building assembly kits; ingots, billets, forgings, rolled round flat latch bar and rolled flat latch bar, all being semi-finished and finished machine components and all made of common metal; turnkey assembled articles made of metal, namely, alloyed steels, stainless steel, duplex and super duplex steel, nickel and super steel, nickel, and metal alloys for aerospace, oil and gas and chemical processing, mechanical tubing and oil country tubular goods (OCTG) for chemical processing, wellhead, downhole and completion applications; structural parts and fittings for all of the aforesaid goods; articles and products of common metal and metal alloys, namely, alloyed steels, stainless steel, duplex and super duplex steel, nickel and super steel, nickel, and metal alloys for aerospace, oil and gas and chemical processing, mechanical tubing and oil country tubular goods (OCTG) for chemical processing, wellhead, downhole and completion applications