Glass with Extended Thermal Shock Protection allows safe and easy handling of high temperature processes. G. M. M. Pfaudler Ltd. Is an ISO 9001-2008 company that manufactures Glass with Extended Thermal Shock Protection. G. M. M. Pfaudler Ltd. Also manufactures wide range glass lined equipments. Glass with Extended Thermal Shock Protection provides potential for reduced cycle time compared to conventional vessel glass. Its extended thermal shock protection is used for faster heating and cooling. It is ideal for the higher temperatures required by latest chemical process applications. The Steel provides increased operating safety margin through its enhanced thermal protection. It comes under the brand name of Ultra-Glas 6500.