The sub assemblies and components that make up this Master Cylinder include this Cylinder-assy-master, the most expensive part.
In this schematic the "Washer-seal,10.1x14.5" is used most often.
The most reasonably priced component used on the Kaf620-ref Mule4010 2014 Usa / Trans4x4 Master Cylinder is the Bolt-flanged,6x10.