aluminum wood swing door 1:good sealing 2:top high security 3:heat insulation 4:thermal break 1)Pass thirdparty certification2)Have ... water proof, anti-aging, windproof, air permeation resistanceExcellent Performance1)Sound Insulation: RW>28dB2)Pressure Resistance: Third clsss(GB/106)3)Air ... Permeation Resistance: Third class(GB/108)4)Heat Insulation Resistance: Third: 2.8/(m2k), 2.5W/(m2k), or ...