This is a replacement crisper glass insert for your refrigerator. It fits into the crisper pan frame and acts as the top of the crisper pan, as well as a shelf for food storage. Because it is made of glass, the insert can occasionally become cracked or broken, and in this case, it will need to be replaced. To replace the insert, simply slide the old insert out and replace it with the new one. The glass insert measures approximately 17.12" X 15.40", and is sold individually. This is an OEM part sourced directly from the manufacturer.