Parrot Uncle Brass Screw Thread DIY Light Socket Vintage Copper Lamp Holder for E26 E27 Light Bulbs, Golden w/Key Switch, Tall Medium E26/E27 standard base Rated for up to 600W, 110v-250v Electrolier size: 1.4" diameter shell Cap is 1/8" threaded for lamp nipple with set screw Parrotuncle E26 E27 light bulbs also available in Eileen Grays now