The Bolt (4fl) is the lowest priced item on this Vorderer Hauptbremszylinder schematic.
This Master Cylinder Assy is the most expensive of the items that make up this Vorderer Hauptbremszylinder assembly.
Some items from this specific schematic: Diaphragm, Reservoir, Cylinder Kit, Master, Washer(6ta), Master Cylinder Assy.