... ,E27,E40,B22,GU10,GU24 etc2. Inserted Metal: aluminium/ iron/ copper/ brass/ stainless steel.3. OEM is available4. CE approved5. safty ... E27 material partsScrew shell1.Aluminum-plated copper2.Copper & brasscenter contact1.Iron-plated copper2.Copper & brassconnector1.iron2.Copper Delivery time:Around 20 days after ...