1,inner tank:stainless steel-0.60mm
2,vacuum tube:QB-AL-N/AL-58-2000
3,Outer tank:painted steel-0.4mm;stainless steel SUS304-0.4mm
4,Frame:coated galvanized steel-1.5mm;stainless steel SUS-1.5mm
5,the material of insulation:polyurethane 50mm
6,the reflecto;Aluminum component ;AL99.85% surface oxidation

7,Copper coil;12mm,thickness 0.8mm