... in big quantity 4, CE Feature of Saint Firstman's foam glass (1), Non-inflammability: Grade A1 (2), Hard ... wall structure. (4), Work under temperature between -196°C ~ 400°C, not creating changes to its shape.(5), Long lifetime, ... in investing in cooperating with Saint Firstman on the foam glass and on supplying your very special products, welcome ... we would like to show our love for you. foam glass