BCP Light Socket Adapter Converter For E40 Mogul Edison Screw Base to E27 Medium Edison Screw Base (Pack of 6) Easy to use, screwing into existing socket as usual Color: White; Material: PTB. Easily converts E40 Mogul Edison Screw Base to E26/E27 medium screw base. Save money of replacing the original lighting fixtures. Product Dimensions: 1.75 x 2.00 inches