Heat Pipe Solar Hot Water Heater OEM accept Mini order can be 5PC 2% discounts KeyMark CE, ISO Approved Inner tank: stainless steel sus304/2B,δ1.2mmOuter tank: gavanize/colour steel,δ0.5mmFrame: gavanize steel,δ1.4mmInsulation:polyurethane forthing,δ50mmVacuum tube:Ø58×1800mmheater pipe: Ø14-6-0.6mm,inside of Vacuum tubeAccessories:electrical heater,non return valve,safety valveLogo:OEM,colour ...