(OEM)Non pressure solar water heater 1.For 5years warranty 2.CE,CCC,ISO,approved 3. ... : 0.4mm colored steel or 0.4mm SUS304-2B .3. Stand: galvanized steel with painting,or Aluminium alloy, or stainless steel ... tank heat insulation layer: 50~60 mm polyurethane foam.5. Stand angle: 15 degree, 20 degree, 25 degree, 30 degree, 38 ...