Incandescent Lampholder,porcelain, Mogul Base 4000 Volts Pulse,1500W-600V, Keyless, White Glazed KD/75 Leviton Carton Bulk. Brass Nickel Plated Lamp Grip Screw Shell, With-Bronze Nickel Plated Center Contact Stamped UL And CSA. Stainless Steel Coil Spring Under Center Contact.