The Glass Tray is an OEM part for GE microwaves. This tray holds food items and rotates them during the cooking process to ensure even heating. It fits into the turntable mechanism, allowing the food to be cooked uniformly. Causes of a bad glass tray can include cracks or breaks from accidental drops, chips from heavy or sharp objects, and wear and tear from regular use.   Symptoms of a bad glass tray include: Cracks or chips on the glass surface The tray not rotating properly Unusual noises during operation Uneven cooking or heating of food This OEM GE part is also compatible with Hotpoint, RCA, and some Kenmore models.WB49X10224 (AP4484560) replaces WB49X10222, 1556401, PS2370393.