Pack of 3 Sockets for one low price! Easy to assemble with included wiring diagram! Both U.L. and C.S.A. listed, these sockets are rated to 250W and 250V. The bottom cap has a 1/8 IP female thread that will fit onto any standard lamp pipe. The working parts include a sturdy phenolic interior mechanism, brass screw type contacts and an aluminum shell with a cardboard liner. Medium Base Fits standard household bulbs and is great for repairing lamps. These sockets have 2 Lamp Controls, 3 Terminals, First On, Second On, Both On Off Sequence and used For Controling Two Sockets.This offer is for a package of 3 top quality sockets for one low price.