Reels are revolvable devices around which lengthy, continuous items such as cable, wires, paper, etc., are wrapped for transportation or storage. Reels are available as simple storage devices although more advanced styles are self-winding. They are also available with live connections that allow an item like a hose or electrical cable to be used while still on the reel.  Typically reels are sold as individual items. Hose and cable are not supplied.  A cable reel is a reel that carries a conductive cable or lifting cable.  A hose reel is a reel that carries a hose for use with gas or liquids.  A storage reel is a reel that carries items other than cable or hose, such as paper or rope.  Live connection reels are outfitted with connection hardware to allow electricity / air / gas / liquid to be passed through it while the hose or cable is still on, or partially on, the reel.  A reel assembly includes a reel, a wire and possible features mounted on the hose or cable. An example would be an electrical cord, on a reel, with a light attached.