Zing Ear ZE-310D ceiling fan dual lampholder can hold up to two standard base light bulbs, Includes ZE-109M pull chain switch, with on-off speed function. ZE-310D is commonly used in ceiling fan bowl or lamp fitter, for example, it is compatible with Hunter, Hampton Bay, Harbor Breeze, etc. Lamp Holder rated at 660 Watts 250 Volts. Obtained UL certification and CSA approval. Light Switch is made from high quality aluminum plasted brass ,not easy to rust. If you have any quality problems, please contact us, we are online 24 hours. ZE-310D ZE-109M Socket Pull Chain Switch is made from high quality aluminum plasted brass for fixtures which require higher crush resistance. Dual light socket fixture with a pull chain on and off. Also included is a brass locknut. Similar products come without a locknut so I'm saving you a trip the the hardware store by including it. The switch and socket assembly typically replaces defective ceiling within ceiling fans, chandeliers, and lighting fixtures.