Steel alloy; class 100, mil-s-13326; comprised of 6 plates 0.380 in. To 0.750 in. Thk; one steel alloy tube, 1.750 in. Od by 0.375 in. Wall thk; 13.930 in. O/a lg of tube; 11.310 in. Lg by 7.750 in. H of flap; painted camouflage forest green per mil-e-52798 or mil-e-52835