... lamp socket,ceramic lampbase 1)E27,E40,E26,E14,B22 2)CE/LVD/ROHS 3)Metal:Copper/Iron/Aluminium E39 porcelain lampholder,lamp ... holder,porcelain lamp socket,ceramic lampbase 1.B22,E10,E12,E14, ... B22,E27, E40 Series etc. Body MaterialPorcelain/ ceramic Metal MaterialScrew shellaluminium/iron/copper/brassCenter connectCopperWire connectCopper/ ...