(6-Pack)Mogul Socket E39 to Medium Screw E26 E27 Socket Adapter,Porcelain Material of E39 Adapter Reducer Converter (6 PCS /PACK) 6pcs in a lot.Allows the use of a E26 (medium base) light bulb in a E39 mogul base fixture UL Listed.Solid Porcelain Material.High Temperature Resisitant Max.Voltage/Wattage: 250V / 660W Easy to install.Applicable for standard light bulb with E26 E27 lamp base Quality Insurance: 1 year replacement warranty &7 days return for free