I have two Mike Bender shafts that are 29" long, 12.25mm and have the standard Black/Silver railroad rings that Mike uses. They are used but in very good condition. The shafts are nice and straight with no nicks or dents. I am looking to trade them for two Mike Bender shafts with a diameter of 12.75-13mm. I prefer the longer 30" shafts, but that is not a requirement. They do need to have the standard Black/Silver railroad rings so they match the butt of the cue. Thanks Much!!!