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U pipe solar collectorFeature1.twin-glass evacuated tubes:Reliable,Website:http://www.sidite-energy.com, efficient, High temperature resistantanti-freezing.2.There is no water in the vacuum tube, it can still work even one tube is broken.3. U pipe, most efficient4.aluminum alloy manifold and bracket, corrosion resistance, easy to install. It can be installed both on flat roof and inclined roof5.more flexible Installation, installation angle from 0 degrees to 90 degrees, roof and wall hanging installation.6.high temperature resistant rock wool / glass cotton insulating layer, high density, good