GE Microwave Glass Turntable Plate / Tray 12 1/2 " WB49X10021 This microwave plate ONLY fits the G.E. models listed below. If you are unsure about compatibility please email us with your model number BEFORE ORDERING. Glass turntable plate / tray for G.E. microwave ovens Measures approximately 12 1/2 inches in overall diameter. Outside diameter of turntable track is 9 1/4 inches. This microwave tray replaces G.E. part # : WB49X10021