we specialize in both designing and manufacturing vacuum circuit breaker (VCB), LV/MV cubicle, MV insulator and accessories etc. for many company of transmission and dispatch for nearly 20 years. the volt from 3.3kV to 40.5kV series of products. We are the leading enterprise in China, manufacture two kinds of vacuum circuit breaker, one is the general type (VS1), and second the embedded poles type (VW1 series). Both have many kinds of products according to the voltage and current degree. The accessories like the insulator and wall bushing etc. are also our strong products. And we also awarded the ISO9001 quality management system certificate, ISO14000 environment management system certificate and OHSAS18000 Certificate of conformity of occupational health and safety management system certification. The Type Test and Routine Test report can also be provided. More information about our company and products pls browse our company web www dot chinawankong dot com. We have supplied our product for world market for several years, and they are quiet satisfied for our quality, so I believe we can meet or exceed your quality requirements and cut down your cost. China Wankong Group Electric Co. Ltd. Mobile:+86-136-76568508 Tel: +86-577-62872328 Fax:+86-577-62872581 Email:anniechan789 at gmail dot com MSN:anniechan789 at live dot cn