Lampholder, Bulb Base Type Recessed Double Contact (R17d), Color White, Compatible with Grainger Part Number Not Applicable, Compatible with Manufacturer Model Number Not Applicable, Features Pedestal Style, Vertical Mounting Orientation, Length 2 1/2 in, Product Type Lamp Holder, Voltage 600V AC, Watts 660 W, Connection Quickwire, Finish Thermoset, Mounting Screw, Slide-On, Wire Gauge (AWG) 18 AWG, Compatible with Brand Universal, Contact Material Silver-Plated Copper Alloy