Stuffing Box - built of 2 halvs
Channels in the stuffing box (4-5 or so)
'scrapers' in each of the channels, consisting of...probably...3 pieces @ ~120 degrees of reach around the piston rod (or 4 @ 90, depends on design I guess)
scrapers have 'lamella' inserts which are designed to 'softly' scrape the oils from the piston rod separating cyln oil from C.C oil.
(those inserts often have a high zinc content, so if you take drip samples from the stuffing box and the zinc levels are up, it might be a clue they're starting to wear/break down)
On the outside of the scraper pieces have a circular groove to fit garder springs around them to keep them taught to the piston rod to apply pressure to scrape the oil but not excessive pressure.
Stuffing box is fitted into position by securing it to the piston rod, slowly turning-gear it up into place. A flange is then secured below it to ensure it holds in place.
Then you could go on to say how the segregation of comb. space and C.C via the stuffing box is an incredible advantage because specific oils for the both applications, and 'no' products of combustion should go into the C.C.
If you're ever going to open/inspect/replace be sure to give the under piston space a real good cleaning because it's going to be full of oil and carbon and just crappy stuff, which you don't want to fall into the C.C when you pull it down.
AND be sure to include all safety related concerns when doing works like this. Permits, lock/tag out, sniff it, clean the C.C, harnesses in the C.C it's also working at height, controller of the turning gear is the one in the engine so they know whats going on in the inside if it's ever moving, proper lighting, watch keeper outside the confined space yadda yadda..lots of safety stuff.
I don't have my 2nds, still need plenty of sea time for that, so it may not be an adequate response - but it was all off the top of my head.