If you discover that the glass cooking tray in your microwave is damaged, you may have to replace it to operate the microwave properly. The glass cooking tray connects to the turntable of the microwave and rotates to ensure even cooking. This part is made entirely of glass, and is about 14 inches in diameter. Many of our customers rated this repair as very easy. To complete the repair, simply remove the old cooking tray and replace it with the new one. Be sure to remove any broken pieces with the old cooking tray. This product is sold individually.