lampbase,porcelain lamp holder,ceramic lamp socket 1)E27,E40,E26,E14,B22 2)CE ... Metal:Copper/Iron/Aluminium Porcelain lampholder,lamp holder,porcelain lamp socket,ceramic lampbase 1.E10,E12,E14, E26,E27,E39, ... ModelPorcelain E14, E27, E40 Series etc. Body MaterialPorcelain/ ceramic Metal MaterialScrew shellaluminium/iron/copper/brassCenter connectCopperWire connectCopper/ironVoltage110V-660VElectric4A ...