Black Salsa Shaft post, 26.8mm diameter, 400mm long. A bit worn with some scratching to the anodizing with a lot missing near the minimum insertion mark.
It is 190mm to the scratch in the top picture (in the first post of the thread) above the zigzagging then there are a couple of small scratches at the back and a very thin scratch up near the top by the logo as I've tried to show with these pictures but if you want better quality I can email them to you.