I've been imagining how I could make a perfect sphere for several years and finally own the skill to do so...These are stainless discs which are 10 inches in diameter x 3/16ths thick ,cold formed with a 100 ton frame press to an exact radius using accurate male and female dies(which I made).The sphere is configured as a dodecahedron would be(12 plates), except instead of pentagons ,I'm using circles(discs). The final figure is just over 19 inches in diameter,so it's NOT perfect but damn close. I have been exploring sacred geometry for several years and beginning to incorporate what I've learned in my constructions...