... ,air permeability performance,Good watertightness performance,heat rsistant property.simple and convenient operation,occupying small space,elegant in ... 3.Chambers: 3,4,5,6,,excellent heat-insulating effect and airtightness. 4.Profile thickness:Thickness of main ... , such as arc windows, curved windowsGlassFloat Glass, Insulated/insulating/hollow Glass, Tempered/toughened/strenghtened Glass, Low-e Glass ...