1)material : borosilicate Glass ; expansion coefficient : 3.8*10-7k 2) resistant to heat up to 800celcius degrees,corrosion 1)material : borosilicate Glass ; expansion coefficient : 3.8*10-7k2) resistant to heat up to 800celcius degrees,corrosion and scratch3) no environmental risk4) transparency5)good sealedOur main products are pyrex glassware, such as glass baking dish, glass casserole, glass ...