The Exd Cast Aluminium Exd solution is manufactured and designed by Tech-Ex Systems, purely a British manufactured product, offering a versatility in the applications it can be used, from Starters, Isolators, Control Stations, Complex Control Panels or Relay panels and many more. Designed suitable for installation in certified for hazardous areas of Zone 1, 2, 21 and 22. The enclosures are fabricated from Cast Aluminium.