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