6 Flexible pipe and pipeline products, namely, pipe, fittings, pipe clips, collars, connectors, couplings and joints; steel pipes and tubes; branching tubes of metal for pipelines, compressed air pipe fittings of metal; metal cable wire; non-electric cables; reinforcing materials of metal for building purposes, but not including hose, flexible pipe or pipeline products or other products used for oil or petroleum retail dispensing or fueling purposes