... polyurethane integral foaming, superior heat preservation 5. Sealing: Silicon Gel O Ring 6. Top Tank: 1.0mm colored steel ... : 55mm polyurethane integral foaming, superior heat preservation5. Sealing: Silicon gel O ring 6. Frame: 1.2 mm SUS202 stainless ... Layer: 55mm polyurethane integral foaming, superior heat preservation5. Sealing: Silicon gel O ring 6. Frame: Aluminium alloy, width: 100mm, thickness ...