... split solar water tankFeatures:1, Inner water tank:SUS304-2B food Grade Stainless steel Thickness:1.2-1.5mm2, Outer water tank: Color plate thickness ... of vacuum tube:1500mm/1800mm/2100mm6,Vacuum tube Purchase:15/16/20/24/30/367, Cold resistance:-30°c3,hailstone:resistance ... 25mm Advantages:1,CE,CCC,ISO9001:2000 certificates,2,collectors can be designed ...