... your selection. 3.Chambers: 3,4,5,6,,excellent heat-insulating effect and airtightness. 4.Profile thickness:Thickness of main ... processing6.Glass:single glazing(4mm,5,6,8,10,12mm),double(insulating)- (5+6+5,5+9+5), /triple glazing,LOW-E ... American styleProduct FeatureEnergy saving and Ecofriendly; Sound and Heat insulation; Good air and Water proof; Anti-aging and Easy maintainance.PVC profile1, ...