... .96WeightKg35kgManufacture Standard GB/T6424, EN12975, EN12976Certification Body CE, CCC,ISO9001 (China)Collector PanelsMaterial0.25mm Aluminum, ... chromeAbsorptivity95 % ± 2%Emissivity4 % ± 2%Special Solar Low Carbon wove Steel GlassThickness3.2mmConductivity≥97%Collector InsulationmaterialsFiberglas ... plate collectors for the solar water heating system.And we can provide you with good quality products ...