Glo-shine pack of 12 E17 to E26 Light Socket, Bulb Base Adapter Converter, Light Socket Adapter, Convert Intermediate Socket E17 to Medium Socket E26 (12-pack) 12 packs E17 to E26 socket converter in a pack. Easy to install. Simply screw the socket adapter into E17 type socket, and then screw in an E26 bulb. Enlarge the light bulb socket. Enlarge the intermediate socket E17 to medium socket E26. Applicable with incandescent bulb, CFL bulb & LED bulbs under electric current limitation Material:Durable temperature Resistance Plastic Housing,Dimension:Dia 39.3 mm X H59 mm / Dia 1.55"X H 2.32"