... sputtering membrane,absorption≥97%,emission(100°c)<3%.4.Header pipe:Red copper tube(TP2)DN22x0.8,copper purity≥99.9 ... %.5.Riser pipe:Red copper tube(TP2)DN22x0.8,copper purity≥99.9 ... .k).10.Advanced Germany blue sputtering membrane,integral panel soldering,assembly line process such advantage adopted to prove flat collector higher quality ...