porcelain knife switch 3P100AD 1. Factory direct 2. Safe usage 3. Customized designs ... iron plated copper.zinc alloy wiring post Fuzhou Faithreach Ceramic & electronic Co., ltd has been specializing in manufacturing porcelain products since ... of porcelain products from socket, terminal block, lamp holder, knife switch, insulator, to fuse. Pls. feel free to contact us if ...