This is the replacement shelf insert for your refrigerator. It is made of glass and is approximately 24 inches by 16 inches. The shelf insert slides into the shelf trim and acts as a top for the crisper drawers, as well as a shelf to store food items. Replace the shelf insert if it is cracked or broken. To replace the shelf, simply slide the old shelf out, and remove the trim. Attach the trim to the new insert and slide it back into place. This part is an authentic OEM part and it is sold individually.