For example, let's say there's a business that has reels of wire rope, yarn, or chain. Or even tanks full of gasoline. In all of those cases, what is being sold is not the whole reel or tank, but measurable parts of it. Compare this with an off-the-shelf item that is just sold whole.
I'm looking for a term to use to refer to these items that are not sold whole. Is there such a term?