We still have some Aerotech Claymore 50" shafts available at this link.
If you scroll down the page you can see the specifications for these shafts. Keep in mind the USGA limits driver length to 48" these days and is considering bringing it down to 46".
The Grafalloy ProCustom at 48" long would be the next longest shaft we have in stock. It is an R/S combination flex shaft.
Date published: 2017-05-31