Glo-shine E26 mediumBase to E17 InstermediateBase Socket Adapter Reducer,It adapts E17 InstermediateBase light bulb to E26 mediumBase socket(6 PACK) Enlarges your E17 bulb base to fit E26 medium sockets UL Standard.Quality,safe and eco-friendly Easy to install.Suitable for E17 CFL and LED bulbs Reference Max.Voltage/Max.Wattage: 250V / 75W High temperature resistant, erosion resistant and anti-flaming