Our 3-Way Lamp Sockets: Standard medium base E26/E27 lamp socket, screw-in design is easy to be installed. Edison retro style black lamp holder will add a vintage touch to your home and office decor. vintage lamp parts for making lamps, perfect with a DIY desk or floor lamp to create a unique fixture for your home or office. Specification: 1. UL Listed 2. Turn-knob On/Off 3. Voltage Range 0-250V 4. Maximum wattage 250W 5. E26/E27 Medium Base Lamp Sockets Package Quantity: 4 Packs x Table Lamp Socket Replacement Note: Always make sure lamp cord is unplugged prior to rewiring any lamp.<br>