... as ordinary glasses: flexural strength is3-5 times and shock strength 5-10 times of ordinary glass.Intensity ... float glass. Preference or perfect ordinary flatglass and high-class or perfect float glass are ... 4, 5, 6, 8, 10, 12, 15 and 19 mm. Curved surface glass is sorted to 5, 6 and 8 mm. ... kinds.High strength Tempered double glazing Glass with E-mark and DOT certification breaks in a unique way ...