Specifications: 1) Pipes: 47 x 1,500mm, 58 x 1,800mm, 70 x 2,000mm 2) Heat holding layer: computerized temperature holding, adopt polyurethane as material 3) Water tank material (outside): fluorine-carbon coating plate PVDF =80% 4) Heat holding layer: computerized temperature holding; polyurethane , thickness of heat-holding layer: 55 - 75mm 5) Frame material: inter-converted tri-pieces frame with diverse applications; imported zinc-coated steel with spraying 6) Sealed ring: macromolecule silicon rubber 7) Reflecting angle: 38 - 50° 8) Temperature (sunny season): 40 - 96°C/day