Souriau ELIO Fibre Optic 8D Series Backshells, Right Angle or Straight Boot Souria ELIO backshells for straight or right angled heat shrink boots, suitable for tactical cables or protection tubes for sealed and low mechanical retention applications. These Souriau 8D series ELIO backshells are aluminium bodied with green cadmium plating and are specifically designed to allow for the movement of the contact and its cable within the 8D Series connector assembly, designed to conform to MIL-DTL-38999.