E40 Die-casting lamp holder 1) E40 porcelain lamp base 2)Carton Meas.39*26*30cm. 3)MOQ:5000PC ... .Fuzhou Faithreach ceramics&electronic Co.,ltd here. we supply porcelain lamp holders range from E10, E12,E14,E17,E27,E40 to B22 ... .Terminal block: copper/iron/zinc alloy. The production of Porcelain Lamp holder & Lamp base & Lamp socket: