1,inner tank;stainless steel SUS304-0.5mm

2,Vacuum tube;QB-AL-N/AL-47-1500/58-1800

3,OUTER TANK;PAINTED STEEL -0.4MM/aLUMINUM-ZINC COATED

4,FRAME;Coated galvanized steel -1.5mm;stainless steel SUS304-1.5mm

5,the material of insulation;polyurethane 50mm/60mm/65mm

6,the reflector;Aluminum component;AL99.85% surface oxidation;stainless steel.