The Glass Cooking Tray is an OEM replacement part for Samsung over-the-range microwaves. Constructed with durable tempered glass, this tray provides a surface for baking, broiling, and other cooking tasks.  Causes of a bad glass cooking tray can include cracks or chips developing from impact or thermal shock over time.  Symptoms of a bad glass cooking tray include: Food not cooking evenly or browning properly Cracks or fractures visible that compromise the integrity of the glass This Samsung replacement tray is also compatible with some Sears/Kenmore microwaves.DE63-00624A (AP4580303) replaces DE63-00536A, 1810047, PS4228224.