... and copper safer 3.CE and OEM accept E27 to E40 lamp base adapter,ceiling light holder1.Approved CE2.Fittings:aluminun,copper,iron ... ,zinc alloy,nickel plated3.Other type:B22\BA15D\BA15S\E10\E11 ... \E12\E14\E17\E26\E27\E39\E40\GU10\GU24\T84.accept OEM5 ...