This Avantco 17818566 right hinged solid door is a perfect replacement for the one that came with select SS-WT-27R-HC, SS-UC-27R-HC, and AU-27R-HC 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 can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly.