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 Horizontal Contacts. For 20 ga Panel Thickness, Non-Shunted, Pedestal Type with Plunger Ends, Quickwire Terminals, Length 1 3/4 in, Product Type Lamp Holder, Voltage 600V AC, Watts 660 W, Connection Quickwire, Finish , Compatible with Brand Universal, Contact Material Silver-Plated Copper Alloy