This carbon K-Force post is basically brand new - taken off of a new bike after one 20-mile road ride. It's a 27.2mm diameter post so it will fit a lot of road or cyclocross bikes. It has 25mm of setback so it's a very comfortable ride. The only reason I'm selling it is because I need a post with zero setback to get my new bike to fit me properly. Below is a link with all the specs, directly from Full Speed Ahead. This post retails for over $190, but I'm only asking $150. Please message me with any questions. Thanks!