The 12028034 is a genuine Bosch Set of Jets - LP Conversion Kit. The Bosch 12028034 is used to convert from natural gas to propane. 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 12028034 Set of Jets - LP Conversion Kit fits the following brands of ranges: Bosch, Thermador The Set of Jets - LP Conversion Kit for select Thermador Pro Harmony® gas ranges.