KE47A Vacuum tube: 47x1500mm Inner tank: Stainless Steel 304 2B food grade Outer tank: Aluminum Galvanized sheet with metal painting Outer tank dia.420mm Frame: Aluminum with anti-oxidation treatment Insulation: 50mm polyurethane total forming with pressure and high density Available sizes: 18, 20, 22, 24, 28, 30, 36 tubes with tank capacity 117L up to 230L