lampbase,porcelain lamp holder,ceramic lamp socket 1)E27,E40,E26,E14,B22 2)CE/LVD/ROHS 3)Metal:Copper/Iron/Aluminium ... independently.7. Meet CE/LVD/ROHS standard ModelPorcelain E14, E27, E40 Series etc. Body MaterialPorcelain/ ceramic Metal MaterialScrew shellaluminium/iron/copper/brassCenter ... : Popular in both domestic and overseas market. E14 Porcelain Lampholder with CE and ROHS Certificate