lampholder,porcelain lampsocket,ceramic lamp base 1)E27,E40,E26,E14,B22 ,E39 2)CE/LVD/ROHS 3)Metal:Copper/Iron/Aluminiu Porcelain lampholder ... ,lamp holder,porcelain lamp socket,ceramic lampbase 1.E10,E12,E14 ... , E26,E27,E39, E40 lampholder,porcelain knife switch,fuse unit series etc.2.Metal ...