The 10005091 is a genuine Bosch Star Burner Cap - Size B. The Bosch 10005091 Star Burner Cap - Size B fits the following brands of gas ranges: Bosch, Kenmore, Thermador The Bosch 10005091 helps protect the body of the burner as well as gathering heat to help cook your meals. The 10005091 is a new part that doesn't replace any other part. 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.