MTM Hydro Whip lines are used to connect a pump to your hose reel. This hose has a wrapped black carbon jacket specifically manufactured for short runs of high pressure. These whip lines have 3/8” Male NPT fittings installed at both ends. One side is fixed (immobile) and the other is swiveling so that you can install in tight, fixed locations. Be sure to apply either Loctite or Teflon to the threads before installing.