Pack of 10 Intermediate Base (E17) to Candelabra Base (E12) Socket Reducer Adapter E17 to E12 Bulb Reducer Take an (E12) Candelabra Base bulb and use it in a Intermediate Base (E17) fixture Durable, heatless and long-lasting, can also be used outdoors Works with all types of bulbs Easy to install. Simply screw the socket adapter into E17 type socket, and then screw in an E12 bulb. Package includes 10 adapters