Bottle closures of metal; Ducts of metal for ventilating installations; Elbows of metal for pipes; Hardware, namely, metal brackets for general use; Manifolds of metal for pipelines; Metal air conditioning ducts; Metal ball lock pins; Metal bottle caps; Metal containers for compressed gas or liquid air; Metal cylinders for compressed gas or liquids, sold empty; Metal flanges; Metal penstock pipes; Metal valves not being parts of machines; Pegs of metal; Rope thimbles of metal; Rotating juncti...