The 00756420 is a genuine OEM Bosch Turntable Ring. The Bosch 00756420 rotates in the center of the microwave to help ensure the food cooks evenly. It is recommended to either refer to your appliance service manual, contact your appliance manufacturer, or contact a service professional to validate the needed part number for your appliance prior to purchasing. The Bosch 00756420 Turntable Ring fits the following brands of microwaves: Bosch, Thermador The 00756420 replaces: 756420 The 00756420 is 8.5 inch diameter.