... 2.Antifreezing -40 degree 3.OEM provide Split Pressurized solar thermal system1,Size:58/1800,47/1500 2,CE,SRCC,Solar ... , Three target type.Insulation: rock wool or import PU,hailstone resistance: 25mmbracket: aluminum alloy, thickness: 3.0mmFeature:1.That collector can ...