1:100% using of solar energy 2:High quality with lowest pirce 3:Fast delivery SP-IP01CHARACTERISTICSThis type works with high pressure.So the water flows out with pressure and use more comfortablely.It uses heat pipe to transfer the heat to water to heat it rapidly.The advantage is if one vacuum tube is broken,it still can work. Material 1.Vacuum tube:GB-CU-SS-N/AL-58-1800 2.Inner tank:SUS304-2B, ...