The 00617211 is a genuine OEM Bosch Wave Guide Cover. The Bosch 00617211 covers the microwave emitter inside the microwave. 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 00617211 Wave Guide Cover fits the following brands of microwave, microwave hood combos: Bosch The 00617211 replaces: 617211 The 00617211 is also called Wave Guide - Mica Sheet.