Rebuild kit for new commercial model steam/water valves only. The Epoca and Classe series machines were the first to use this style valve, but your old valve could have been replaced with this new version at some point. Keep an eye out for the two mounting screws on the diamond shaped flange. This indicates it is the new style valve that this kit is applicable to.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.