This part is a replacement door shelf retainer bar for your refrigerator. The shelf retainer bar connects to the end cap on either side, and the end caps connect it to the refrigerator door. The retainer bar allows you to store items in the refrigerator door, without them falling out when the door is opened or closed. If your door shelf retainer bar is broken or missing, you will need to replace it. Some refrigerators contain multiple door shelf retainer bars, as well as multiple end caps. Keep in mind that this door shelf retainer bar is sold individually. It is made of white plastic and is approximately 23 inches in width.