Structure: Insulating glass unit consists of two or more lites of glass being separated by a high-quality spacer and air space which has been scaled by an organic compound and kept continually dehydrated by a specially formulated drying agent inside the spacer screen. If you want to further enhance thermal-insulated and sound-insulated property, you may fill inert gas in the space. Characteristics: Reducing heating and cooling costs by reducing air-to-air heat transfer. Reducing condensation. Reducing sound transmission Increasing personal comfort and aids in energy conservation. Increasing strength for higher windload requirements. Specification: Max: 2500x3500mm Min: 180x350mm Thickness of Aluminum Frame: 6mm,9mm,12mm,16mm