Hi guys...some years ago when I was rebuilding a 74 250..I purchased a set of "rebuild kits" to suit Marzocchi shocks ....got new shafts seals etc..when they arrived they were bigger than the shafts in the shocks I had...so..I think approx I had 10 or 12mm shafts and the new ones were 13 or 14 ish ..not sure...anyway ...I have two complete shocks (dis-assembled) but would require some mods to get the damper tubes etc to work with the new shafts I have....Have no use for them now anyone interested...Oh..they are in Australia