Brand new MGB clutch master cylinder rebuild kit with new piston.  Fits all years 1963-1980 OE Lockheed "Tin Can" clutch masters.  These will likely not fit aftermarket masters.  Likewise the internal parts are interchangeable between the earlier type masters with cup type seals since this has the new piston. So no fear about getting a kit that does not fit the internals of the original master.   

These are made in the UK by 920E which used to be called AE and AE Lockheed and they were the OE suppliers for the clutch masters.  

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