Altec multi cell sheet metal

Anyone have a idea on what size sheet metal altec used on there multi cell horns?

Thanks,
Nick

I see my question was a bit vague. I'm referring to the gauge or thickness of the sheet metal used to make the horns.


I don't need exact. I'm guessing its around 18 gauge but I'm not sure since I've never seen a pair in real life.

Thanks,
Nick