Hangzhou Strong Electric Co., Ltd (SEC) is a professional company for manufacturing and exporting porcelain insulators, composite insulators and line fittings for transmission, power station, substation and railway electrification. SEC have four sub-subsidary factories which specialized in technical developing and making; SEC establishes one set of quality management system. All the four factories have got ISO9001 certificate. The process of quotation, handing order, quality management and technical supporting are strictly carried out according to the ISO9001 procedure; All the factories have advanced manufacturing and inspection equipments. We control strictly for raw material, manufacturing, inspection, packing and others. SEC has good technology, competitive price and stable quality to support our customers, our products can meet IEC, BS, ANSI, AS and DIN standards. And we are also able to develop new products according to customerâs requirements; SEC supply for different power companies, electrical corporations and OEM buyer as well as particate in all kinds of tenders. We are cooperating with clients from 30 countries such as USA, Greek, Sourth Africa and Argentinaâ¦; All the employees in SEC will offer quality products and satisfied service by the specialist know-how with the best sincereness. We wish to establish a good commercial cooperation relationship with you.