Box glass is machined by two or more layers of laminated glass together there is a border around the sealed edge, in the middle is the dry, inert air layer. Glass box is the most effective solution to prevent the transfer heat from high temperature to high temperature Low through glazing installation. When using low E glass or energy control glass if the sun is paired, the glass will be very efficient preserving indoor temperature and preventing heat from Solar Product characteristics: Thickness: 12-60mm Max size: 2440x3660mm Standard: JIS R 3209: 1996, ...