... .electric booster 4.T/P Valve; safety valve Pressurized Solar Hot Water Cylinder 1, ISO9001:2008 Quality Management System2, CECapacity:100,150L, 200L, 300L, 400L ... steel SUS403, thickness 0.5-1.0mmThe insulating layer:-50mm high density polyurethane. good temperature preservation-The heat exchanger: 1.5KW ...