2 mm thread pitch (or 'coarse' thread) means that these knobs have threads on the inside that measure 2 millimeters from thread peak to thread peak. This is the current version used on newer Linea Classic models. Prior to ~2013, La Marzocco previously used both this part and/or a 1 mm version. They work with any valve that uses the F_333 valve fitting. Includes bezel.
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.