This Avantco 17812546 door frame is a perfect replacement for the one that came with select UBB-72G-HC and UBB-72G-HC-S series units. 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 frame can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly.