... Quality warranty:5years 4.Professional OEM Stainless steel solar water heaterPrinciple: Compact Non-pressure Solar Water Heater relies on desity of ... water tank: 0.31mm, 0.4mm, 0.5mm stainless steel,or colorful armor plate, or PVDF Heat preservation: ... .5mm thickness stainless steel or galvanized steel plate or alumminum alloy.Angle of bracket: 25°, 38°, 45°Reflector: stainless steel sheet or ...