Hartley received support for his proposal from the chairman of Anglo-Iranian, Sir William Fraser, who was also the petroleum advisor to the War Office, and from Henry Wright, the managing director of Siemens Brothers. Fraser agreed to pick up the costs of trials, albeit in the hope that the government would subsequently reimburse the company.[14][15] Siemens Brothers developed the cable in conjunction with the National Physical Laboratory based on their existing undersea telegraph cable. It was known as Hais, from Hartley-Anglo-Iranian-Siemens.[16] The 2-inch (5 cm) diameter inner pipe, which would carry the petroleum, was made from extruded lead.