Question about Tubing Manufacturers

[CyclingStudent]

Hi,
I'm wondering if someone could help me understand the manufacturing process better for the cycling industry. Does anyone know who the major manufacturers of tubing are that bike manufacturers then use to build the frames. So far the only company I can seem to find is Easton? Any information would be appreciated.
Thanks

 

[alienator]

Easton, Reynolds, True Temper, Columbus, MacLean Composites, Dedacciai Tubing.......Those are some of the tubing manufacturers. There are more.