STC500100 Land Rover (Girling) Clutch Master Cylinder - Defender/S3/SIII.  This only the master cylinder, if you have the adaptor for a clutch switch then this will need to be re-used.  These are exactly the same as genuine Land Rover equivalents, just without the JLR box.  A new high quality fluid cap is also included. Reference Part Numbers: 550732G STC100410G STC100411G STC500100G