For sale is one polycarbonate shield assembly, comprised of two 1/2" thick polycarbonate pieces, each cut in the shown shape. Great way to make a window for your homemade submarine, nuclear fallout bunker, high voltage experiments, face shields, and more.
I am not 100% sure that this is polycarbonate, this is arc shield meant for high voltage arcs and explosions at Fermilab. But I think that it is.
See pictures for dimensions.