Power lines, electrical porcelain insulators play a supportive, insulation effect. Electrical porcelain insulators used in the line, you should select the voltage level of the power line to adapt to electrical porcelain insulators.
James supply the lamp holders, bulb holders, E27 lamp holder and GU10 lamp holder 30 years!
Copyright @2012-2016 James Lighting Ceramics & Electronic CO.,LTD