... alone, or mixed in certain proportion. Sound insulation: Hollow glass filled with inert gas reduces 30 db of noise, and ... Under environment of large difference in temperature in winter, hollow glass is dew-free. Usage: Office building, hotel, hospital and ... 2400mmX3000mm Min for processing: Thickness of hollow glass: 200mmX300mm: 12mm-50mm Thickness of glass slice: 3mm-12mm Aluminum Pipe in store ...