Dong Guan Selmag Electronic Co., Ltd is a professional manufacturer, importer and exporter of electronic products with high quality & competitive price. Including Ferrite toroid cores, Amorphous cores, MPP cores, Sendust Cores, High Flux cores, Mega Flux cores, various kinds of coils, chokes, switching power supply transformer, high frequency transformer, inverter transformers. All the above products can be manufactured according to customer's request.We, Selmag Electronic Co., Ltd already passed ISO9001-2000 Edition, we are doing our efforts to guarantee all customers 100% satisfaction.