Leviton White Porcelain Incandescent Cleat-Type Lampholder

Surface mounted. Medium base with open terminals. 1-7/8 In. O.D. x 1-1/2 In. H. Mounting holes on 1-15/16 In. centers (diagonal from terminals). Rated 660 watts/250 volts. UL (Underwriter's Laboratories) listed.