6 Valves of metal, other than as machine parts; valve assemblies of metal, other than as machine parts; valve manifolds of metal,
other than as machine parts; metal manifolds for use with hydraulic and pneumatic systems, other than as machine parts; pipe
couplings and structural component fittings of metal, structural component parts and fittings of metal for all the aforesaid goods;
tubes and pipe systems of metal comprised of metal flanges, metal casing heads, metal tubing heads, metal Christmas tree
systems, metal master valves, choke/gate/ball and kelly valves, BOPs (blow out preventers); metal hardware, namely, metal rings,
gaskets, bolts and nuts, bodies, fittings, plugs, blind connections, metal crosses, solid blocks