COBRAFLEX® materials and construction methods • Fabricated from 300 series Stainless Steel with a highly flexible outer spiral wrap • Multiple layers of super–insulation are applied to achieve the lowest possible heat loss • Every hose is helium leak tested to ensure its vacuum integrity • To achieve the longest service life in the industry every hose is heat soaked during evacuation and is equipped with chemical getters • Fabrication techniques from welding to insulating are unmatched by any other manufacturer to ensure years of efficient and safe use.