5pcs - (E26/E27 To E26/E27 Extender) - E26/E27 Standard Medium Socket Edison Screw Lamp Base Socket Extender Extension Adapter Used for LED and CFL lights ONLY, Not for Incandescent light bulbs. Package includes: 5pcs E27 extenders. Easy to screw into an existing socket, extend your current E27 screw to 2.5 inches. High temperature resistant, erosion resistant and anti-burning. Pull up the inner copper sheet for better contact with bulb's base.