lampholder,porcelain lamp socket,ceramic lampbase 1)E27,E40, ... /LVD/ROHS 3)Metal:Copper/Iron/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: ... / copper/ brass/ stain steel, ACCORDING TO CUSTOMER'S CHOICE.5. OEM/ ODM is acceptable6. We are manufacture, but has ...