Toughened glass insulators Toughened glass insulator is , up to now, not only running in china but also having been exported to oversea nearly 50 foreign counties, and has a bright future in global market. Our products can apply wiyh iec, bs, as, ansi, and din standards ete. As well as chinese standard. We are sincerely willing to have a cooperation in the world with all customers who come from anywere.