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Name: BLUE FAIRY solar water heater specification: tank（mm) ：outerΦ **0 tube：Φ*7****0/Φ*8****0 high effective tube frame：Cold-rolled steel sheet material ： inner tank stainless steel, SUB****2B food, 0.*1mm， outer tank: fluorine titanium, 0.*1mm，insulation :*5mm polyurethane foam，al-refective banner Specification of vacuum tube structure all glass concentric dual tube geometry， Material borosilicate 3.3 glass Absorptive coating properties Con structure grade AL - Nx/AL solar selective absorptive coating Method of deposition dc reactive sputtering absorptance > *7 % emittance < 3 % Stagnation temperature **0 - **0 c Work life not less than *5 years Manual control water-feed We can offer you CE and ISO quality with low price