Flat Panel Solar Collector, flat-plate solar collectors, solar heat collector, with Maximum Working Pressure of 1.0MPa, Flat Panel Solar Collector, flat-plate solar collectors, solar heat ... )Riser tuber size: 10 x 0.6mm (8 pieces)Insulation material: fiberglass insulationInsulation thickness: Back: ... working pressure: 1.0mPaTesting pressure: 1.5mPaBack plate: 0.40mm galvanized steelDimensions: (L) 2, ...