I removed this 9 1/4" seat post from a 1971 Schwinn Collegiate. It is in very good condition for being 50 years old. It does have a little oxidation around the post at seat level and some scuffing from removal. The bottom shaft is 13/16" diameter and the seat part of the shaft is 5/8" in diameter. I am selling it as is with no returns. No international sales. Thank you for looking and please stay safe.