Inner tank:stainless steel SUS304-0.5mm
Vacuum tube:QB-AL-N/AL-47-1500/58-1800
Outer tank:painted steel-0.4mm/aluminum-zinc coated steel-0.45mm/stainless steel SUS304
Frame:coated galvanized steel-1.5mm;stainless steel SUS430-1.55mm.
The material of insulation:polyurethane 50mm/60mm/65mm.
The reflector:aluminum component;AL99.85% surface oxidation;stainless steel