All Manhasset stands come with a lifetime warranty, so the only reason you could have for buying this replacement shaft is that your stand has some cosmetic damage.
It consists of a heavy-duty powder coated outer shell and a greaseless sliding chrome inner tube with the famous 'magic finger' clutch system hidden inside. There's no need to do any complicated construction yourself as the shaft comes fully assembled, ready to be bolted into your existing base and desk.
The shaft is identical to the component shipped with the standard Symphony model.
Read the introduction to Manhasset stands on the Chamberlain Music blog...