Screw Lampholder 1.Specification: 125V~ 660W 2Material: Bakelite, Plastic, Copper,Aluminum,Iron 3Certificate:CCC,CE 1.Screw Lampholder/Lamp Base 2.Specification: 125V~ 660W 3.Material: Bakelite, Plastic, Copper,Aluminum,Iron 4.Certificate: CE, ISO9001: