27.0 !! Had this in the Pista pretty much since I got that bike but finally got a Campy post a couple years ago. I was always happy with it. Simple and not offensive.
It’s about 13.75" (350mm) from where the rails go to the bottom of the shaft.
It’s actually kinda worse than what it looks like in the photos (so zoom in) especially if you’re gonna have a lot of it exposed, but it could be polished up a bit. I’ll send it to you for free.