Parrot Uncle Brass Screw 110V-250V DIY Threaded Light Socket with Pull Chain Vintage Copper Lamp Holder for E26 E27 Light Bulbs, Golden Pull Chain Switch Medium E26/E27 standard base Rated for up to 600W, 110v-250v Electrolier size: 1.4 Cap is 1/8 Parrotuncle E26 E27 light bulbs also available in Eileen Grays now