Ritchey 350+ mm Bicycle Seatposts
About Ritchey - "Ritchey bicycle components have been raced to victory in some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics and it all began in a simple garage in Menlo Park, California with Tom Ritchey.'
Seatpost length is measured in millimeters. It is typically measured from the bottom of the post to the center of the rail mount.