Lamp base and Lamp Holder: E14,E27,E12,E26,E17,E10,E5,E40,S8.5,S7,BA15S,BA15D,BA9S,P13.5S,etc. certification:SGS SpecificationsMaterialPackingRemarkE27Brass 15,000/Exporter Carton;LxBxH: 47x31x26mmWe Produce All Kinds Of Lamp Holder: E14,E27,E12,E26,E17,E10,E5,E40,S8.5,S7,BA15S,BA15D,BA9S,P13.5S,etc.