1 E39 lampholder 2 Material:Porcelain, iron, copper and others 3 Voltage:220V Premium Quality & Modern Technology ... Material : Porcelain4 Voltage : 220v 5 Size: E40 type lamp holder with decoration pattern6 Easy installation. simple operationWe can design and ... in producting high and low voltage product, such as lamp holder, socket, plug, light, switch, connector, fuse, insulator, spindle, cable, ...