[TowerTalk] Where is the best place to buy aluminum tubing?

[JACK CAMPBELL]

Looking for some small 1"1/4 inside diameter to go on the bottom of some spreaders and some 3" to 4" boom stuff
for some long booms.
Wonder how long of a boom can be made from 3" aluminum tubing. Looking at a 60ft boom.
Wonder if anyone has played with small aluminum tower for a boom. Does anyone make stuff smaller then 20G.
I guess aluminum irragation aluminum pipe could work, anyone tried that before.
Looking for some input.

Jack
KZ4USA