This Avantco 17831002 bottom solid sliding door is a direct replacement for the one that came with Avantco DDLC-50-S refrigerated deli cases. It's a vital part of your refrigerator's door assembly, working to create a firm door seal and keep the cabinet set to the right temperature. It's also used for accessing the extra storage area of the unit. 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.