... Aluminium E39 porcelain lampholder,lamp holder,porcelain lamp socket,ceramic lampbase 1.B22,E10,E12,E14, E26,E27,E39 ... , E40 lampholder,porcelain knife switch,fuse unit series etc.2.Metal: aluminium/iron/copper/brass ... E14, B22,E27, E40 Series etc. Body MaterialPorcelain/ ceramic Metal MaterialScrew shellaluminium/iron/copper/brassCenter connectCopperWire connectCopper/ironVoltage110V- ...