Heavy 1/8" wall brass tube, 6" OD, 66" long. Weighs about 45 pounds. Long enough for a classic F12 to F15 refractor. Or make two beautiful F6 to F8 scopes. Very good condition, does have a few minor scratches which will polish out. A brass tube of this size is now very rare. $650, which includes UPS ground and a wooden crate.
I also have some heavy wall 4 inch tube suitable for a tailpiece, sold only with the six inch tube, and only enough for a tail piece.