Replacement burrs for the single phase 110 volt (higher voltage grinders have a larger size burr set) version of the Mazzer Robur Conical Espresso/Coffee Grinder. Mazzer 186C.
Factory replacement tutorial.
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.