[TowerTalk] Universal tower help

[mikflathead at aol.com]

I recently erected a 50 foot Universal tower. It has a 14 inch top section with a tube for the mast. It is a pain to drop the tower. I need to know what size is the inside diameter of the tube that the mast goes thru so I can purchase the mast. Unfortunately there web site shows all the dimensions but the tube size. Can someone help? Thanks Mike