... absorption 3 High-quality materials 4 Personalized design Solar Water Heater, Non-pressure solar water heater, Direct plug solar water heater Detailed description:1) Inner tank : stainless steel ... ) Stronger wind, snow, and hailstone resistant ability8) The hot water system fitting for families and work units in mass storage ... -1800mm ( 16-36 pieces) capacity ( 168L-380L) ETC Type Solar Water Heater