Bullet proof glass is made of two or more layers of toughened glass. Between the layers of glasses is special pvb film. After the process of high temperature and pressure, it will be as clear and transparant as normal glass. Application: mainly used as the front desk in the bank, postal, telecom, stock, insurance department. museum, high grade residence, prison Main specs: Max size(mm):2440 x 6000 Min size(mm):300 x 300 Thickness(mm):3-19 wooden case