Efficient Lighting: SAVE $$$ by Changing Light Bulbs - YVSC
Light Socket Shade Rings,Aluminum Threaded Socket Ring for Medium Base E26 Sockets,Retaining Rings for Glass Lamp Shades/Light Fixtures (4-Pack White Color/For Thread Diameter 1-1/2 Inches) - Amazon.com
Full Thread Light Socket Brass Cord Grip Black Shade Ready - Etsy