One of two different length heater cables, which are very close in overall length.
This cable has a white sheath and the cable is 463mm end to end (18 3/16 inches long)
See the other one below (457 mm long) to make certain that you are ordering the correct cable.
This is the heater return hose and is the shorter of the two heater hoses. It runs from the heater back to the engine block. A clamp is used on each end.