... 3.CE and OEM accept E27 to E40 lamp base adapter,ceiling light holder1.Approved CE2.Fittings:aluminun,copper,iron,zinc ... -A-E27/E40 screw type E27 to E40 lamp base adapter is made by the flame retardant PBT and copper material ... lamp holder fixture by E40 base lamp. very easily replace. adapter under CE standard quality. PBT is resistant to solvents, shrinks ...