lampholder,porcelain lamp socket,ceramic lampbase 1)E27,E40,E26,E14,B22 2)CE/ ... porcelain lamp socket,ceramic lampbase 1.B22,E10,E12,E14, E26,E27,E39, E40 lampholder,porcelain knife switch,fuse unit series etc.2 ... LVD/ROHS standard ModelPorcelain E14, B22,E27, E40 Series etc. Body MaterialPorcelain/ ceramic Metal MaterialScrew shellaluminium/iron/copper/brassCenter connectCopperWire connectCopper/ ...