Lampholder, Bulb Base Type Medium Screw (E26), Color White, Compatible with Grainger Part Number Not Applicable, Compatible with Manufacturer Model Number Not Applicable, Length 12 7/8 in, Product Type Lamp Holder, Voltage 250V AC, Watts 660 W, Finish Porcelain, Mounting Twist-Lock, Standards CSA Certified, NOM, UL, Compatible with Brand Universal