Clutch master cylinder to suit all Series 3, Defender/110 and all Perentie models. These do fail over time, and should be replaced by a good quality name-brand unit. We use PBR or TRW (as supplied here). There are plenty of cheap ones out there; we haven't found one worth fitting. That said, if your budget is limited see STC500100C.
We generally recommend replacing the slave cylinder at the same time; it does the same amount of work as the master cylinder and often fails at about the same time.
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