They have quite an interesting site, have a look at http://www.surgetek.co.zaEstablished in 1970, Surge Technology, trading as Surgetek, specialises in all aspects of lightning and surge protection. Since its inception, the company has played a leading role in drafting relevant SABS earthing and lightning protection codes, and its highly experienced staff has served on various SABS IEC liaison committees. Surge Technology is listed with the ISO 9001 Quality Assurance Programme and certification was awarded during July 1999.
(Bet you've got that AC/DC song playing through your head now )