Sierra Master Cylinder Pushrod

[davylock]

A quick question, excuse my ignorance, but never having seen one before, what does the master cylinder pushrod look like?. Is it M6 Bar threaded at just the one end that goes to the pedal clevis, or is it threaded at the master cylinder end as well, or just pushed in?, & approximately, how long is it?.
I've never taken a master cylinder apart, so it's new to me what exactly I need, cheers, Dave.