... -tech3. Header Tube :copper T2; Φ22*0.6mm; 2pcs, 4. Riser Tube: copper T2; Φ8*0.6; 8pcs,5. Glass cover :low ... wool30mm (40g/cm3)8. Back PlateGalvanized plate, or aluminum plate, 0.5mm9.Surface Dimension(mm) :2000 *1000 *80 , 2000*800*80 ... ,South America ,Eastern Europe ,Southeast Asia, Mid East ,Western Europe. 2012 Newest Patented flat panel solar collector system