Specifications: 1) Tank Inner tank: SUS 304-2B (food grade) Stainless Steel. Outer tank: SUS 201 Stainless Steel. Insulation layer: Polyurethane Foaming. Heat preservation: 72h. Tank capacity: 98L ~ 300L. 2) All Glass Vacuum Tube Diameter:ª¦47, ª¦58 Length: 1500mm, 1800mm. Numbers of tube: 15, 16, 18, 20, 24, 30pcs. Hail resistance: 25mm 3) Bracket Material: SUS 201 Stainless Steel. 4) Accessories: Electric Heater, Controller, Assistant Tank, Magnesium Stick and so on. Pack in cartons