Glass to be three ply consisting of one ply 0.250 in. Nom thk one ply 1.000 in. Nom thk one ply 0.750 in. Nom thk, de-icing film to be on inboard side of 0.250 in. Glass, all glass to be heat treated, o/a w 48.125 in. Nom, o/a h 40.125 in. Nom, o/a thk 2.000 in. Nom