Our Contacts Office Al-Ahsa 31982 - Hofuf, Saudi Arabia Telephone:+966 013 581 0665 Fax:+966 013 583 4506 Email:info@hgl.sa Deputy Manager Laboratory:+1 959 603 6035 Mobile:+966 555 916 767 Fax:+966 013 583 4506 Email:mahmoudhamawi@hgl.sa