Use this Avantco 17812424 left hinge as a direct replacement for the original part that came with your unit. Replace a worn or damaged door hinge right away to ensure that the interior of your refrigeration unit is tightly sealed and your food items are held at the appropriate temperature. It is compatible with Z2-R4-K and Z2-F-4K reach-in units (sold separately) and is installed in the middle section of the unit, functioning as the hinge for both the top and bottom doors.