The inner is 4 layers of glass with braces, 2 layers of matt and 2 layers of 1708 biaxle. The outter i stopped counting after 6 layers, the outter has at least a 1/4 inch thinckness while the inner is about and 1/8 thick. I didn't have that much gap on the outter edge to work with but i think i made it up on the inside.
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