A full 180-degree hose end for AN4 PTFE hose, sending the line straight back parallel to itself. It is the last resort fitting for genuinely awkward spots: a turbo oil feed that must clear the housing, a brake or clutch line pinned against a bulkhead, or gauge plumbing in a crowded bay. The seal is the standard PTFE arrangement, with an olive compressed onto the liner by the nipple as the socket nut is tightened, so the end can be rebuilt. A full reversal is the most restrictive shape available, so reserve it for cases where nothing gentler will fit, and set the clocking before assembly.