... High pressure and high suction 2)key part of solar water heaters,solar collector 3)well-structured,reasonable designed ... GB/T6424, EN12975, EN12976Certification Body CE, CCC,ISO9001 (China)Collector PanelsMaterial0.25mm Aluminum, Copper TP2 Φ10, thickness: ... 2%Maximal Temperature190 °C 1000W/m2Packing PaperWorking LifeYear15Pls read the specification carefully, for other questions you want ask, kind ...