Lampholder Bulb Base Type Medium Screw (E26) Color White Compatible with Grainger Part Number Not Applicable Compatible with Manufacturer Model Number Not Applicable Features (4) Terminal Screws Termination Keyless Operator One-Piece Construction Single Circuit Length 4 1/2 in Product Type Lamp Holder Voltage 250V AC Watts 660 W Connection Quickwire Finish Porcelain Mounting Twist-Lock Standards CSA Certified NOM UL Compatible with Brand Universal