... : Within 15days 4.5years guarantee parabolic trough solar collectorDetails:Solar collector : Dimension( L*W*H ): 2000*1000*80mm Copper Header Tubes ... life, enduring high temperature.3.All copper core. Adopting ultrasonic welding, header pipe diameter up to 22mm,few weld line, more ... , good heat preservation, firm and long service life.size of collector(mm):2000*1000*80(L*W*H)Header pipe material ...