This Avantco 17818535 left hinge solid door is a direct replacement for the one that came with Avantco UDD-36-HC kegerators and UBB-36-HC bar refrigerators. It is a vital part of your unit's door assembly, working to create a firm door seal and keep the cabinet set to the right temperature. A broken or malfunctioning door can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly.