Antique Brass finish, high quality lamp socket Comes with a threaded cap and shell, cap is 1/8 IP Rated 250W-250V Large, solid brass turn knob UNO thread Choice of interior switch function: On/Off or 3-way U.L. listed These high quality, U.L. listed antique brass finish lamp holders are specially designed for use in the manufacture and restoration of fine table and floor lamp lighting. Each style comes with a threaded cap and shell for superior strength and beauty. These are the lamp sockets of choice when mounting UNO fitter style lamp shades to bridge arm floor lamps. Large solid brass turn knob style switch with on/off or 3-way interior and UNO thread. Rated 250W-250V.