[Orion.DeYoe]

Originally Posted by lynca

Where do you usually get this material and how much does it cost ?
McMaster doesn't have the size that you mentioned.
http://www.mcmaster.com/#aluminum-pipe/=t5e992

The part number is 9056K75.
You should look under "tubes for fabrication". What you're looking at is typically referred to as "pipe" (there actually is a difference between "pipe" and "tube").
McMaster is a horrible place to get raw material from though. It's ridiculously expensive.