What, praytell, is a "golf tube" arrow shaft

[Gorm of Berra <gormofberra@mindspring.com>]

Poster: Gorm of Berra <gormofberra@mindspring.com>

Unto the denizens of the Merry Rose does the Gorm of Berra send
greetings,

In perusing the information on SCA-legal combat archery (as my wife is
pondering doing this), I have seen an entry that makes absolutely no
sense to me.

Shafts must be wooden or "golf tube".  

Umm...what is "golf tube"?  I understand that it is not aluminum, and
not wood.  I've asked a few archery suppliers here in Richmond, and they
had no idea.

Also, where can one acquire the blunt tips?  I know I've seen archers
with them, where can you get them?

Thanks in advance,

Gorm of Berra
Gormofberra@mindspring.com
=======================================================================
List Archives, FAQ, FTP:  http://merryrose.atlantia.sca.org/
            Submissions:  atlantia@atlantia.sca.org
        Admin. requests:  majordomo@atlantia.sca.org