E12-D02A phenolic lamp holder (Edison) Base have durable PHENOLIC (Bakelite) Plastic Shells. Mounting brackets are threaded 1/8 IP.

E12 bakelite lamp base Can Be Used with SPT-1 or SPT-2 Wire
Shells are made of Durable Phenolic Plastic (Bakelite) and e12 black light socket are Metal Lined
Lamp holder Use Standard Household Bulbs
Metal Mounting Brackets are Threaded 1/8 IP and need 7/16″ diameter mounting hole.
Can be used with light bulbs up to 660 watts.
For INDOOR Use Only.