Almost new center console tower with canvas

I'm interested, how wide are the stanchions at the floor and the top weld, and what are the top dimensions of the frame. I have a 17 1/2 armstrong aluminum center console.
also is the frame all aluminum or is it stainless.
 
It's polished anodized aluminum. The stanchions are adjustable for width up to about 56" wide (fits a console upto 50" wide)ImageUploadedByTapatalk1441560100.255806.jpg
 
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