Used in the 'E' version Kony, Major, Robur and Royal, and the doser versions of the Kony, Major, Major 'Grocery', Robur, Royal and Stark model Mazzer grinders - basically any newer version that has the black locking tab style hopper throat adapter. This is the switch responsible for allowing the grinder to turn on only when the hopper is installed.
Attention CA Residents: Prop 65 Warning
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.